Updated on 2025/07/02

写真a

 
MATSUZAKI Yuichiro
 
Organization
Faculty of Science and Engineering Associate Professor
Other responsible organization
Electrical, Electronic, and Communication Engineering Course of Graduate School of Science and Engineering, Master's Program
Contact information
The inquiry by e-mail is 《here》
External link

Degree

  • Doctor of Philosophy in Materials ( オックスフォード大学 )

  • Specialization of Multidisciplinary ( 東京大学 )

Education

  • 2011.3
     

    The University of Tokyo   doctor course   withdrawn before completion

  • 2011.2
     

    オックスフォード大学   マテリアル学部   doctor course   completed

  • 2007.3
     

    The University of Tokyo   master course   completed

  • 2005.3
     

    Waseda University   graduated

Research History

  • 2023.4 - Now

    Chuo University   Faculty of Science and Engineering   Associate Professor

  • 2019.1 - 2023.3

    National Institute of Advanced Industrial and Science Technology   Chief Researcher

  • 2011.4 - 2018.12

    NTT basic research laboratories

  • 2017.4 - 2018.3

    Kyoto University   Institute for Chemical Research   visiting associate professor

  • 2011.2 - 2011.3

    Aalto University   Postdoctor

Research Interests

  • quantum information theory

  • quantum metrology

Research Areas

  • Natural Science / Mathematical physics and fundamental theory of condensed matter physics

Papers

  • Nuclear spin metrology with nitrogen vacancy center in diamond for axion dark matter detection

    So Chigusa, Masashi Hazumi, Ernst David Herbschleb, Yuichiro Matsuzaki, Norikazu Mizuochi, Kazunori Nakayama

    Physical Review D   2025.4

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevD.111.075028

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  • Robust phase estimation of the ground-state energy without controlled time evolution on a quantum device Reviewed

    Hiroki Kuji, Yuta Shingu, Tetsuro Nikuni, Takashi Imoto, Kenji Sugisaki, Yuichiro Matsuzaki

    Physical Review A   111 ( 4 )   2025.4

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    Authorship：Last author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physreva.111.042618

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevA.111.042618/fulltext

  • Entanglement-enhanced ac magnetometry in the presence of Markovian noise Reviewed

    Thanaporn Sichanugrist, Hajime Fukuda, Takeo Moroi, Kazunori Nakayama, So Chigusa, Norikazu Mizuochi, Masashi Hazumi, Yuichiro Matsuzaki

    Physical Review A   111 ( 4 )   2025.4

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    Authorship：Last author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physreva.111.042605

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    Other Link： https://link.aps.org/article/10.1103/PhysRevA.111.042605

  • Digital-analog variational neural-simulation hybrid eigensolver with classical shadow Reviewed International coauthorship

    Yuta Shingu, Yukun Zhang, Yuichiro Matsuzaki, Tetsuro Nikuni, Xiao Yuan, Yiming Huang

    Japanese Journal of Applied Physics   64 ( 2 )   02SP44 - 02SP44   2025.2

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    Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    Variational quantum eigensolvers (VQEs) are garnering significant attention for their ability to estimate the ground-state energy of target Hamiltonians. In particular, digital-analog quantum computation (DAQC) stands out as a crucial platform for VQEs in the noisy intermediate-scale quantum era, leveraging single-qubit operations and natural time evolution governed by parameterized Hamiltonians. On the other hand, the variational quantum-neural hybrid eigensolver is also a vital technique that enhances the accuracy of estimating expectation values, utilizing parameterized quantum circuits combined with neural networks. This hybrid approach typically requires the implementation of several controlled gates before measurements and post-processing. However, implementing controlled gates within the DAQC framework poses challenges. To address this, we propose a hybrid architecture that integrates DAQC with neural networks, substituting controlled gates with the classical shadow method. Our approach maintains a polynomial measurement cost as long as the number of qubits with Pauli X or Y operators in each term of the target Hamiltonian is constant or , where N q denotes the total number of qubits. We demonstrate the efficacy of our method through numerical simulations, applying it to estimate the ground-state energy of the H2 molecule.

    DOI： 10.35848/1347-4065/adb438

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    Other Link： https://iopscience.iop.org/article/10.35848/1347-4065/adb438/pdf

  • Linear regression using quantum annealing with continuous variables Reviewed

    Asuka Koura, Takashi Imoto, Katsuki Ura, Yuichiro Matsuzaki

    Japanese Journal of Applied Physics   2025.1

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    Authorship：Last author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    Linear regression is a data analysis technique, which is categorized as supervised learning. By utilizing known data, we can predict unknown data. Recently, researchers have explored the use of quantum annealing (QA) to perform linear regression where parameters are approximated to discrete values using binary numbers. However, this approach has a limitation: we need to increase the number of qubits to improve the accuracy. Here, we propose a novel linear regression method using QA that leverages continuous variables. In particular, the boson system facilitates the optimization of linear regression without resorting to discrete approximations, as it directly manages continuous variables while engaging in QA. The major benefit of our new approach is that it can ensure accuracy without increasing the number of qubits as long as the adiabatic condition is satisfied.

    DOI： 10.35848/1347-4065/adad7e

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    Other Link： https://iopscience.iop.org/article/10.35848/1347-4065/adad7e/pdf

  • Single-qubit rotations on a binomial code without ancillary qubits Reviewed

    Yuki Tanaka, Yuichiro Mori, Yuta Shingu, Aiko Yamaguchi, Tsuyoshi Yamamoto, Yuichiro Matsuzaki

    Japanese Journal of Applied Physics   2024.12

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    Authorship：Last author,　Corresponding author   Publishing type：Research paper (scientific journal)  

    DOI： 10.35848/1347-4065/ad95f4

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  • Direct moment estimation of intensity distribution of magnetic fields with quantum sensing network Reviewed

    Hiroto Kasai, Yuki Takeuchi, Yuichiro Matsuzaki, Yasuhiro Tokura

    New Journal of Physics   2024.11

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    A quantum sensing network is used to simultaneously detect and measure physical quantities, such as magnetic fields, at different locations. However, there is a risk that the measurement data is leaked to the third party during the communication. Many theoretical and experimental efforts have been made to realize a secure quantum sensing network where a high level of security is guaranteed. In this paper, we propose a protocol to estimate statistical quantities of the target fields at different places without knowing individual value of the target fields. We generate an enanglement between L quantum sensors, let the quantum sensor interact with local fields, and perform specific measurements on them. By calculating the quantum Fisher information to estimate the individual value of the magnetic fields, we show that we cannot obtain any information of the value of the individual fields in the limit of large L. On the other hand, in our protocol, we can estimate theoretically any moment of the field distribution by measuring a specific observable and evaluated relative uncertainty of k-th (k=1,2,3,4) order moment. Our results are a significant step towards using a quantum sensing network with security inbuilt. 

    DOI： 10.1088/1367-2630/ad93f4

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    Other Link： https://iopscience.iop.org/article/10.1088/1367-2630/ad93f4/pdf

  • Quantum annealing showing an exponentially small success probability despite a constant energy gap with polynomial energy Reviewed

    Hiroshi Hayasaka, Takashi Imoto, Yuichiro Matsuzaki, Shiro Kawabata

    Physical Review A   110 ( 2 )   2024.8

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physreva.110.022620

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevA.110.022620/fulltext

  • Localized Virtual Purification Reviewed

    Hideaki Hakoshima, Suguru Endo, Kaoru Yamamoto, Yuichiro Matsuzaki, Nobuyuki Yoshioka

    Physical Review Letters   133 ( 8 )   2024.8

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    Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physrevlett.133.080601

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.133.080601/fulltext

  • Spectroscopy of flux-driven Kerr parametric oscillators by reflection coefficient measurement Reviewed

    Aiko Yamaguchi, Shumpei Masuda, Yuichiro Matsuzaki, Tomohiro Yamaji, Satoh Tetsuro, Morioka Ayuka, Kawakami Yohei, Igarashi Yuichi, Shirane Masayuki, Yamamoto Tsuyoshi

    New Journal of Physics   2024.4

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    Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    We report the spectroscopic characterization of a Kerr parametric oscillator (KPO) based on the measurement of its reflection coefficient under a two-photon drive induced by flux modulation. The measured reflection spectra show good agreement with numerical simulations in terms of their dependence on the two-photon drive amplitude. The spectra can be interpreted as changes in system’s eigenenergies, transition matrix elements, and the population of the eigenstates, although the linewidth of the resonance structure is not fully explained. We also show that the drive-amplitude dependence of the spectra can be explained analytically by using the concepts of Rabi splitting and the Stark shift. By comparing the experimentally obtained spectra with theory, we show that the two-photon drive amplitude at the device can be precisely determined, which is important for the application of KPOs in quantum information processing.

    DOI： 10.1088/1367-2630/ad3c64

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    Other Link： https://iopscience.iop.org/article/10.1088/1367-2630/ad3c64/pdf

  • How to experimentally evaluate the adiabatic condition for quantum annealing Reviewed

    Yuichiro Mori, Shiro Kawabata, Yuichiro Matsuzaki

    Scientific Reports   14 ( 1 )   2024.4

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    Abstract

    We propose an experimental method for evaluating the adiabatic condition during quantum annealing (QA), which will be essential for solving practical problems. The adiabatic condition consists of the transition matrix element and the energy gap, and our method simultaneously provides information about these components without diagonalizing the Hamiltonian. The key idea is to measure the power spectrum of a time domain signal by adding an oscillating field during QA, and we can estimate the values of the transition matrix element and energy gap from the measurement output. Our results provides a powerful experimental basis for analyzing the performance of QA.

    DOI： 10.1038/s41598-024-58286-2

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    Other Link： https://www.nature.com/articles/s41598-024-58286-2

  • Quantum annealing with error mitigation Reviewed

    Yuta Shingu, Tetsuro Nikuni, Shiro Kawabata, Yuichiro Matsuzaki

    Physical Review A   109 ( 4 )   2024.4

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physreva.109.042606

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevA.109.042606/fulltext

  • Expressive quantum supervised machine learning using Kerr-nonlinear parametric oscillators Reviewed

    Yuichiro Mori, Kouhei Nakaji, Yuichiro Matsuzaki, Shiro Kawabata

    Quantum Machine Intelligence   6 ( 1 )   2024.3

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    Abstract

    Quantum machine learning with variational quantum algorithms (VQA) has been actively investigated as a practical algorithm in the noisy intermediate-scale quantum (NISQ) era. Recent researches reveal that the data reuploading, which repeatedly encode classical data into quantum circuit, is necessary for obtaining the expressive quantum machine learning model in the conventional quantum computing architecture. However, the data reuploading tends to require a large amount of quantum resources, which motivates us to find an alternative strategy for realizing the expressive quantum machine learning efficiently. In this paper, we propose quantum machine learning with Kerr-nonlinear parametric oscillators (KPOs), as another promising quantum computing device. We use not only the ground state and first excited state but also higher excited states, which allows us to use a large Hilbert space even if we have a single KPO. Our numerical simulations show that the expressibility of our method with only one mode of the KPO is much higher than that of the conventional method with six qubits. Our results pave the way towards resource-efficient quantum machine learning, which is essential for the practical applications in the NISQ era.

    DOI： 10.1007/s42484-024-00152-5

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    Other Link： https://link.springer.com/article/10.1007/s42484-024-00152-5/fulltext.html

  • Frequency-tunable magnetic field sensing using continuous-wave optically detected magnetic resonance with nitrogen-vacancy centers in diamond Reviewed

    Ryusei Okaniwa, Takumi Mikawa, Yuichiro Matsuzaki, Tatsuma Yamaguchi, Rui Suzuki, Norio Tokuda, Hideyuki Watanabe, Norikazu Mizuochi, Kento Sasaki, Kensuke Kobayashi, Junko Ishi-Hayase

    Journal of Applied Physics   135 ( 4 )   2024.1

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：AIP Publishing  

    The nitrogen-vacancy (NV) center is a promising candidate to realize practical quantum sensors with high sensitivity and high spatial resolution at room temperature and atmospheric pressure. In conventional high-frequency AC magnetometry with NV centers, the setup requires a pulse sequence with an appropriate time synchronization and strong microwave power. To avoid these practical difficulties, AC magnetometry using continuous-wave optically detected magnetic resonance (CW-ODMR) was recently demonstrated. That previous study utilized radio frequency (RF)-dressed states generated by the coherent interaction between the electron spin of the NV center and the RF wave. However, the drawback of this method is that the detectable frequency of the AC magnetic fields is fixed. Here, we propose and demonstrate frequency-tunable magnetic field sensing based on CW-ODMR. In the new sensing scheme, we obtain RF double-dressed states by irradiation with RF fields at two different frequencies. One creates the RF-dressed states and changes the frequency of the target AC field. The other is a target AC field that induces a change in the CW-ODMR spectrum by generating the RF double-dressed states through coherent interaction with the RF-dressed states. The sensitivity of our method is estimated to be comparable to or even higher than that of the conventional method based on the RF field with a single frequency. The estimated bandwidth is 7.5 MHz, higher than that of the conventional method using the RF-dressed states. Our frequency-tunable magnetic field sensor based on CW-ODMR paves the way for new applications in diamond devices.

    DOI： 10.1063/5.0184629

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  • Universal Scaling Bounds on a Quantum Heat Current Reviewed

    Shunsuke Kamimura, Kyo Yoshida, Yasuhiro Tokura, Yuichiro Matsuzaki

    Physical Review Letters   131 ( 9 )   2023.8

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    Authorship：Last author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physrevlett.131.090401

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    Other Link： https://link.aps.org/article/10.1103/PhysRevLett.131.090401

  • Electron-spin double resonance of nitrogen-vacancy centers in diamond under a strong driving field Reviewed

    Takumi Mikawa, Ryusei Okaniwa, Yuichiro Matsuzaki, Norio Tokuda, Junko Ishi-Hayase

    Physical Review A   108 ( 1 )   2023.7

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physreva.108.012610

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevA.108.012610/fulltext

  • Vector dc magnetic-field sensing with a reference microwave field using perfectly aligned nitrogen-vacancy centers in diamond Reviewed

    Takuya Isogawa, Yuichiro Matsuzaki, Junko Ishi-Hayase

    Physical Review A   107 ( 6 )   2023.6

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physreva.107.062423

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevA.107.062423/fulltext

  • Measurement optimization of variational quantum simulation by classical shadow and derandomization Reviewed

    Kouhei Nakaji, Suguru Endo, Yuichiro Matsuzaki, Hideaki Hakoshima

    Quantum   7   995 - 995   2023.5

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    Publishing type：Research paper (scientific journal)   Publisher：Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften  

    Simulating large quantum systems is the ultimate goal of quantum computing. Variational quantum simulation (VQS) gives us a tool to achieve the goal in near-term devices by distributing the computation load to both classical and quantum computers. However, as the size of the quantum system becomes large, the execution of VQS becomes more and more challenging. One of the most severe challenges is the drastic increase in the number of measurements; for example, the number of measurements tends to increase by the fourth power of the number of qubits in a quantum simulation with a chemical Hamiltonian. This work aims to dramatically decrease the number of measurements in VQS by recently proposed shadow-based strategies such as classical shadow and derandomization. Even though previous literature shows that shadow-based strategies successfully optimize measurements in the variational quantum optimization (VQO), how to apply them to VQS was unclear due to the gap between VQO and VQS in measuring observables. In this paper, we bridge the gap by changing the way of measuring observables in VQS and propose an algorithm to optimize measurements in VQS by shadow-based strategies. Our theoretical analysis not only reveals the advantage of using our algorithm in VQS but theoretically supports using shadow-based strategies in VQO, whose advantage has only been given numerically. Additionally, our numerical experiment shows the validity of using our algorithm with a quantum chemical system.

    DOI： 10.22331/q-2023-05-04-995

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  • Nonstoquastic catalyst for bifurcation-based quantum annealing of the ferromagnetic p-spin model Reviewed

    Yuki Susa, Takashi Imoto, Yuichiro Matsuzaki

    Physical Review A   107 ( 5 )   2023.5

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physreva.107.052401

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevA.107.052401/fulltext

  • Spectroscopic estimation of the photon number for superconducting Kerr parametric oscillators Reviewed

    Keisuke Matsumoto, Aiko Yamaguchi, Tsuyoshi Yamamoto, Shiro Kawabata, Yuichiro Matsuzaki

    Japanese Journal of Applied Physics   62 ( SC )   SC1097 - SC1097   2023.4

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    Quantum annealing (QA) is a way to solve combinational optimization problems. Kerr nonlinear parametric oscillators (KPOs) are promising devices for implementing QA. When we solve the combinational optimization problems using KPOs, it is necessary to precisely control the photon number of the KPOs. Here, we propose a feasible method to estimate the photon number of the KPO. We consider coupling an ancillary qubit to the KPO and show that spectroscopic measurements on the ancillary qubit provide information on the photon number of the KPO.

    DOI： 10.35848/1347-4065/acc3a8

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    Other Link： https://iopscience.iop.org/article/10.35848/1347-4065/acc3a8/pdf

  • Analysis of the shortest vector problems with quantum annealing to search the excited states Reviewed

    Katsuki Ura, Takashi Imoto, Tetsuro Nikuni, Shiro Kawabata, Yuichiro Matsuzaki

    JAPANESE JOURNAL OF APPLIED PHYSICS   62 ( SC )   2023.4

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.35848/1347-4065/acba21

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  • Temperature sensing with RF-dressed states of nitrogen-vacancy centers in diamond Reviewed

    Hibiki Tabuchi, Yuichiro Matsuzaki, Noboru Furuya, Yuta Nakano, Hideyuki Watanabe, Norio Tokuda, Norikazu Mizuochi, Junko Ishi-Hayase

    Journal of Applied Physics   133 ( 2 )   024401 - 024401   2023.1

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：AIP Publishing  

    Using the electronic spin of nitrogen-vacancy (NV) centers in diamond is a promising approach to realizing high-precision temperature sensors; furthermore, pulsed optically detected magnetic resonance (pulsed-ODMR) is one way to measure the temperature using these NV centers. However, pulsed-ODMR techniques such as D-Ramsey, thermal echo, or thermal Carr–Purcell–Meiboom–Gill sequences require careful calibration and strict time synchronization to control the microwave (MW) pulses, which complicates their applicability. Continuous-wave ODMR (CW-ODMR) is a more advantageous way to measure temperature with NV centers because it can be implemented simply by continuous application of a green laser and MW radiation. However, CW-ODMR has lower sensitivity than pulsed-ODMR. Therefore, it is important to improve the temperature sensitivity of CW-ODMR techniques. Herein, we thus propose and demonstrate a method for measuring temperature using CW-ODMR with a quantum spin state dressed by a radio-frequency (RF) field under a transverse magnetic field. The use of an RF field is expected to suppress the inhomogeneous broadening resulting from strain and/or electric-field variations. The experimental results confirm that the linewidth is decreased in the proposed scheme when compared to the conventional scheme. In addition, we measured the temperature sensitivity to be about [Formula: see text], and this is approximately eight times better than that of the conventional scheme.

    DOI： 10.1063/5.0129706

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  • Identification of Different Types of High-Frequency Defects in Superconducting Qubits Reviewed

    Leonid V. Abdurakhimov, Imran Mahboob, Hiraku Toida, Kosuke Kakuyanagi, Yuichiro Matsuzaki, Shiro Saito

    PRX Quantum   3 ( 4 )   2022.12

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    Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/prxquantum.3.040332

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PRXQuantum.3.040332/fulltext

  • Error-Mitigated Quantum Metrology via Virtual Purification Reviewed

    Kaoru Yamamoto, Suguru Endo, Hideaki Hakoshima, Yuichiro Matsuzaki, Yuuki Tokunaga

    Physical Review Letters   129 ( 25 )   2022.12

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physrevlett.129.250503

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.129.250503/fulltext

  • Quantum Battery Based on Superabsorption Reviewed

    Yudai Ueki, Shunsuke Kamimura, Yuichiro Matsuzaki, Kyo Yoshida, Yasuhiro Tokura

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   91 ( 12 )   2022.12

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7566/JPSJ.91.124002

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  • Quantum annealing with twisted fields Reviewed

    Takashi Imoto, Yuya Seki, Yuichiro Matsuzaki, Shiro Kawabata

    New Journal of Physics   24 ( 11 )   113009 - 113009   2022.11

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    Quantum annealing (QA) is a promising method for solving combinational optimization problems and performing quantum chemical calculations. The main sources of errors in QA are the effects of decoherence and non-adiabatic transition. We propose a method for suppressing both these effects using inhomogeneous twist operators corresponding to the twist angles of transverse fields applied to qubits. Furthermore, we adopt variational methods to determine the optimal inhomogeneous twist operator for minimizing the energy of the state after QA. Our approach is useful for increasing the energy gap and/or making the quantum states robust against decoherence during QA. In summary, our results can pave the way to a new approach for realizing practical QA.

    DOI： 10.1088/1367-2630/ac9155

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    Other Link： https://iopscience.iop.org/article/10.1088/1367-2630/ac9155/pdf

  • Guaranteed-accuracy quantum annealing Reviewed

    Takashi Imoto, Yuya Seki, Yuichiro Matsuzaki, Shiro Kawabata

    Physical Review A   106 ( 4 )   2022.10

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physreva.106.042615

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevA.106.042615/fulltext

  • Fast Tunable Coupling Scheme of Kerr Parametric Oscillators Based on Shortcuts to Adiabaticity Reviewed

    S. Masuda, T. Kanao, H. Goto, Y. Matsuzaki, T. Ishikawa, S. Kawabata

    Physical Review Applied   18 ( 3 )   2022.9

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    Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physrevapplied.18.034076

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevApplied.18.034076/fulltext

  • Generation of multipartite entanglement between spin-1 particles with bifurcation-based quantum annealing Reviewed

    Yuichiro Matsuzaki, Takashi Imoto, Yuki Susa

    SCIENTIFIC REPORTS   12 ( 1 )   2022.9

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    Authorship：Lead author,　Last author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41598-022-17621-1

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  • Emergence of Hilbert Space Fragmentation in Ising Models with a Weak Transverse Field Reviewed

    Atsuki Yoshinaga, Hideaki Hakoshima, Takashi Imoto, Yuichiro Matsuzaki, Ryusuke Hamazaki

    Physical Review Letters   129 ( 9 )   2022.8

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society ({APS})  

    DOI： 10.1103/physrevlett.129.090602

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  • Anonymous Quantum Sensing Reviewed

    Hiroto Kasai, Yuki Takeuchi, Hideaki Hakoshima, Yuichiro Matsuzaki, Yasuhiro Tokura

    Journal of the Physical Society of Japan   91 ( 7 )   1 - 12   2022.7

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7566/jpsj.91.074005

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  • Generalized Quantum Subspace Expansion Reviewed

    Nobuyuki Yoshioka, Hideaki Hakoshima, Yuichiro Matsuzaki, Yuuki Tokunaga, Yasunari Suzuki, Suguru Endo

    Physical Review Letters   129 ( 2 )   1 - 6   2022.7

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    Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physrevlett.129.020502

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.129.020502/fulltext

  • Obtaining Ground States of the XXZ Model Using the Quantum Annealing with Inductively Coupled Superconducting Flux Qubits Reviewed

    Takashi Imoto, Yuya Seki, Yuichiro Matsuzaki

    Journal of the Physical Society of Japan   91 ( 6 )   1 - 6   2022.6

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    Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7566/jpsj.91.064004

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  • Quantum-Enhanced Heat Engine Based on Superabsorption Reviewed

    Shunsuke Kamimura, Hideaki Hakoshima, Yuichiro Matsuzaki, Kyo Yoshida, Yasuhiro Tokura

    Physical Review Letters   128 ( 18 )   1 - 7   2022.5

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/physrevlett.128.180602

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.128.180602/fulltext

  • Calculation of Gibbs partition function with imaginary time evolution on near-term quantum computers Reviewed

    Keisuke Matsumoto, Yuta Shingu, Suguru Endo, Shiro Kawabata, Shohei Watabe, Tetsuro Nikuni, Hideaki Hakoshima, Yuichiro Matsuzaki

    Japanese Journal of Applied Physics   61 ( 4 )   1 - 11   2022.3

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    Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.35848/1347-4065/ac5152

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  • Quantum metrology based on symmetry-protected adiabatic transformation: imperfection, finite time duration, and dephasing Reviewed

    Takuya Hatomura, Atsuki Yoshinaga, Yuichiro Matsuzaki, Mamiko Tatsuta

    New Journal of Physics   24 ( 3 )   033005 - 033005   2022.3

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    <jats:title>Abstract</jats:title>
    <jats:p>The aim of quantum metrology is to estimate target parameters as precisely as possible. In this paper, we consider quantum metrology based on symmetry-protected adiabatic transformation. We introduce a ferromagnetic Ising model with a transverse field as a probe and consider the estimation of a longitudinal field. Without the transverse field, the ground state of the probe is given by the Greenberger–Horne–Zeilinger state, and thus the Heisenberg limit estimation of the longitudinal field can be achieved through parity measurement. In our scheme, full information of the longitudinal field encoded on parity is exactly mapped to global magnetization by symmetry-protected adiabatic transformation, and thus the parity measurement can be replaced with global magnetization measurement. Moreover, this scheme requires neither accurate control of individual qubits nor that of interaction strength. We discuss the effects of the finite transverse field and nonadiabatic transitions as imperfection of adiabatic transformation. By taking into account finite time duration for state preparation, sensing, and readout, we also compare performance of the present scheme with a classical scheme in the absence and presence of dephasing.</jats:p>

    DOI： 10.1088/1367-2630/ac5375

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  • Variational secure cloud quantum computing Reviewed

    Yuta Shingu, Yuki Takeuchi, Suguru Endo, Shiro Kawabata, Shohei Watabe, Tetsuro Nikuni, Hideaki Hakoshima, Yuichiro Matsuzaki

    Physical Review A   105 ( 2 )   1 - 10   2022.2

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    DOI： 10.1103/physreva.105.022603

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  • Polarizing electron spins with a superconducting flux qubit Reviewed

    Shingo Kukita, Hideaki Ookane, Yuichiro Matsuzaki, Yasushi Kondo

    Physical Review A   105 ( 1 )   1 - 12   2022.1

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    DOI： 10.1103/physreva.105.012613

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  • Heisenberg-Limited Quantum Metrology Using Collective Dephasing Reviewed

    Shingo Kukita, Yuichiro Matsuzaki, Yasushi Kondo

    Physical Review Applied   16 ( 6 )   1 - 16   2021.12

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    DOI： 10.1103/physrevapplied.16.064026

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  • Quantum remote sensing under the effect of dephasing Reviewed

    Hideaki Okane, Hideaki Hakoshima, Yuki Takeuchi, Yuya Seki, Yuichiro Matsuzaki

    Physical Review A   104 ( 6 )   1 - 18   2021.12

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    DOI： 10.1103/physreva.104.062610

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  • Theoretical study of reflection spectroscopy for superconducting quantum parametrons Reviewed

    S Masuda, A Yamaguchi, T Yamaji, T Yamamoto, T Ishikawa, Y Matsuzaki, S Kawabata

    New Journal of Physics   23 ( 9 )   093023 - 093023   2021.9

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    <jats:title>Abstract</jats:title>
    <jats:p>Superconducting parametrons in the single-photon Kerr regime, also called KPOs, have been attracting increasing attention in terms of their applications to quantum annealing and universal quantum computation. It is of practical importance to obtain information of superconducting parametrons operating under an oscillating pump field. Spectroscopy can provide information of a superconducting parametron under examination, such as energy level structure, and also useful information for calibration of the pump field. We theoretically study the reflection spectroscopy of superconducting parametrons, and develop a method to obtain the reflection coefficient. We present formulae of the reflection coefficient, the nominal external and the internal decay rates, and examine the obtained spectra. It is shown that the difference of the populations of energy levels manifests itself as a dip or peak in the amplitude of the reflection coefficient, and one can directly extract the coupling strength between the energy levels by measuring the nominal decay rates when the pump field is sufficiently large.</jats:p>

    DOI： 10.1088/1367-2630/ac21e1

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  • Boltzmann machine learning with a variational quantum algorithm Reviewed

    Yuta Shingu, Yuya Seki, Shohei Watabe, Suguru Endo, Yuichiro Matsuzaki, Shiro Kawabata, Tetsuro Nikuni, Hideaki Hakoshima

    PHYSICAL REVIEW A   104 ( 3 )   1 - 12   2021.9

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    DOI： 10.1103/PhysRevA.104.032413

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  • Proposed rapid detection of nuclear spins with entanglement-enhanced sensors Reviewed

    Hideaki Hakoshima, Yuichiro Matsuzaki, Toyofumi Ishikawa

    JAPANESE JOURNAL OF APPLIED PHYSICS   60 ( 7 )   1 - 4   2021.7

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    DOI： 10.35848/1347-4065/ac0d88

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  • Controls of a superconducting quantum parametron under a strong pump field Reviewed

    Shumpei Masuda, Toyofumi Ishikawa, Yuichiro Matsuzaki, Shiro Kawabata

    Scientific Reports   11 ( 1 )   2021.6

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    Abstract

    Pumped at approximately twice the natural frequency, a Josephson parametric oscillator called parametron or Kerr parametric oscillator shows self-oscillation. Quantum annealing and universal quantum computation using self-oscillating parametrons as qubits were proposed. However, controls of parametrons under the pump field are degraded by unwanted rapidly oscillating terms in the Hamiltonian, which we call non-resonant rapidly oscillating terms (NROTs) coming from the violation of the rotating wave approximation. Therefore, the pump field can be an intrinsic origin of the imperfection of controls of parametrons. Here, we theoretically study the influence of the NROTs on the accuracy of controls of a parametron: a cat-state creation and a single-qubit gate. It is shown that there is a trade-off relationship between the suppression of the nonadiabatic transitions and the validity of the rotating wave approximation in a conventional approach. We also show that the tailored time dependence of the detuning of the pump field can suppress both of the nonadiabatic transitions and the disturbance of the state of the parametron due to the NROTs.

    DOI： 10.1038/s41598-021-90874-4

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  • Entanglement-enhanced sensing using a chain of qubits with always-on nearest-neighbor interactions Reviewed

    Atsuki Yoshinaga, Mamiko Tatsuta, Yuichiro Matsuzaki

    PHYSICAL REVIEW A   103 ( 6 )   1 - 10   2021.6

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    DOI： 10.1103/PhysRevA.103.062602

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  • Possibility of the total thermodynamic entropy production rate of a finite-sized isolated quantum system to be negative for the Gorini-Kossakowski-Sudarshan-Lindblad-type Markovian dynamics of its subsystem Reviewed

    Takaaki Aoki, Yuichiro Matsuzaki, Hideaki Hakoshima

    Physical Review A   103 ( 5 )   1 - 15   2021.5

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    DOI： 10.1103/physreva.103.052208

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  • Excited State Search Using Quantum Annealing Reviewed

    Yuya Seki, Yuichiro Matsuzaki, Shiro Kawabata

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   90 ( 5 )   1 - 11   2021.5

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    DOI： 10.7566/JPSJ.90.054002

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  • Wide-field AC magnetic field imaging using continuous-wave optically detected magnetic resonance of nitrogen-vacancy centers in diamond

    Karl Joel Hallbäck, Tatsuma Yamaguchi, Yuichiro Matsuzaki, Hideyuki Watanabe, Norikazu Mizuochi, Junko Ishi-Hayase

    Optical and Quantum Sensing and Precision Metrology   1170   2021.3

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    DOI： 10.1117/12.2577024

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  • Direct estimation of the energy gap between the ground state and excited state with quantum annealing Reviewed

    Yuichiro Matsuzaki, Hideaki Hakoshima, Kenji Sugisaki, Yuya Seki, Shiro Kawabata

    Japanese Journal of Applied Physics   60 ( SB )   1 - 4   2021.2

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    DOI： 10.35848/1347-4065/abdf20

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  • Relationship between costs for quantum error mitigation and non-Markovian measures Reviewed

    Hideaki Hakoshima, Yuichiro Matsuzaki, Suguru Endo

    Physical Review A   103 ( 1 )   1 - 7   2021.1

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    DOI： 10.1103/physreva.103.012611

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  • Projecting an ultra-strongly-coupled system in a non-energy-eigenbasis with a driven nonlinear resonator Reviewed

    Suguru Endo, Yuichiro Matsuzaki, Kosuke Kakuyanagi, Shiro Saito, Neill Lambert, Franco Nori

    Scientific Reports   10 ( 1 )   1 - 20   2020.12

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    DOI： 10.1038/s41598-019-56866-1

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  • Control of all the transitions between ground state manifolds of nitrogen vacancy centers in diamonds by applying external magnetic driving fields Reviewed

    Tatsuma Yamaguchi, Yuichiro Matsuzaki, Soya Saijo, Hideyuki Watanabe, Norikazu Mizuochi, Junko Ishi-Hayase

    JAPANESE JOURNAL OF APPLIED PHYSICS   59 ( 11 )   1 - 5   2020.11

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    DOI： 10.35848/1347-4065/abc399

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  • Efficient detection of inhomogeneous magnetic fields from a single spin with Dicke states Reviewed

    Hideaki Hakoshima, Yuichiro Matsuzaki

    PHYSICAL REVIEW A   102 ( 4 )   1 - 14   2020.10

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    DOI： 10.1103/PhysRevA.102.042610

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  • Electrical Control for Extending the Ramsey Spin Coherence Time of Ion-Implanted Nitrogen-Vacancy Centers in Diamond Reviewed

    S. Kobayashi, Y. Matsuzaki, H. Morishita, S. Miwa, Y. Suzuki, M. Fujiwara, N. Mizuochi

    PHYSICAL REVIEW APPLIED   14 ( 4 )   1 - 10   2020.10

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    DOI： 10.1103/PhysRevApplied.14.044033

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  • Control of the transition frequency of a superconducting flux qubit by longitudinal coupling to the photon number degree of freedom in a resonator Reviewed

    Hiraku Toida, Takuya Ohrai, Yuichiro Matsuzaki, Kosuke Kakuyanagi, Shiro Saito

    PHYSICAL REVIEW B   102 ( 9 )   1 - 7   2020.9

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    DOI： 10.1103/PhysRevB.102.094502

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  • Driven-state relaxation of a coupled qubit-defect system in spin-locking measurements Reviewed

    Leonid Abdurakhimov, Imran Mahboob, Hiraku Toida, Kosuke Kakuyanagi, Yuichiro Matsuzaki, Shiro Saito

    PHYSICAL REVIEW B   102 ( 10 )   1 - 5   2020.9

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    DOI： 10.1103/PhysRevB.102.100502

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  • Rabi oscillation and spin echo between ground state manifolds of nitrogen vacancy centers in diamond by external magnetic driving fields

    Yamaguchi Tatsuma, Matsuzaki Yuichiro, Watanabe Hideyuki, Mizuochi Norikazu, Ishi-Hayase Junko

    JSAP Annual Meetings Extended Abstracts   2020.2   932 - 932   2020.8

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    DOI： 10.11470/jsapmeeting.2020.2.0_932

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  • Sequential nonabsorbing microwave single-photon detector Reviewed

    Ivan Iakoupov, Yuichiro Matsuzaki, William J. Munro, Shiro Saito

    Physical Review Research   2 ( 3 )   2020.8

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    DOI： 10.1103/physrevresearch.2.033238

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  • Multiparameter quantum estimation under dephasing noise Reviewed

    Le Bin Ho, Hideaki Hakoshima, Yuichiro Matsuzaki, Masayuki Matsuzaki, Yasushi Kondo

    PHYSICAL REVIEW A   102 ( 2 )   1 - 10   2020.8

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    DOI： 10.1103/PhysRevA.102.022602

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  • Variational-state quantum metrology Reviewed

    Balint Koczor, Suguru Endo, Tyson Jones, Yuichiro Matsuzaki, Simon C. Benjamin

    NEW JOURNAL OF PHYSICS   22 ( 8 )   1 - 20   2020.8

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    DOI： 10.1088/1367-2630/ab965e

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  • Experimental Demonstration of Secure Quantum Remote Sensing Reviewed

    Peng Yin, Yuki Takeuchi, Wen-Hao Zhang, Zhen-Qiang Yin, Yuichiro Matsuzaki, Xing-Xiang Peng, Xiao-Ye Xu, Jin-Shi Xu, Jian-Shun Tang, Zong-Quan Zhou, Geng Chen, Chuan-Feng Li, Guang-Can Guo

    PHYSICAL REVIEW APPLIED   14 ( 1 )   1 - 9   2020.7

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    DOI： 10.1103/PhysRevApplied.14.014065

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  • Electron spin resonance with up to 20 spin sensitivity measured using a superconducting flux qubit Reviewed

    Rangga P. Budoyo, Kosuke Kakuyanagi, Hiraku Toida, Yuichiro Matsuzaki, Shiro Saito

    APPLIED PHYSICS LETTERS   116 ( 19 )   1 - 5   2020.5

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    DOI： 10.1063/1.5144722

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  • Experimental and Theoretical Analysis of Noise Strength and Environmental Correlation Time for Ensembles of Nitrogen-Vacancy Centers in Diamond Reviewed

    Kan Hayashi, Yuichiro Matsuzaki, Takaki Ashida, Shinobu Onoda, Hiroshi Abe, Takeshi Ohshima, Mutsuko Hatano, Takashi Taniguchi, Hiroki Morishita, Masanori Fujiwara, Norikazu Mizuochi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   89 ( 5 )   1 - 6   2020.5

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    DOI： 10.7566/JPSJ.89.054708

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  • Architecture to achieve nuclear magnetic resonance spectroscopy with a superconducting flux qubit Reviewed

    Koichiro Miyanishi, Yuichiro Matsuzaki, Hiraku Toida, Kosuke Kakuyanagi, Makoto Negoro, Masahiro Kitagawa, Shiro Saito

    PHYSICAL REVIEW A   101 ( 5 )   1 - 14   2020.5

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    DOI： 10.1103/PhysRevA.101.052303

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  • Nuclear Magnetic Resonance Model of an Entangled Sensor under Noise Reviewed

    Le Bin Ho, Yuichiro Matsuzaki, Masayuki Matsuzaki, Yasushi Kondo

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   89 ( 5 )   1 - 8   2020.5

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    DOI： 10.7566/JPSJ.89.054001

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  • One-way Transfer of Quantum States via Decoherence Reviewed

    Yuichiro Matsuzaki, Victor M. Bastidas, Yuki Takeuchi, William J. Munro, Shiro Saito

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   89 ( 4 )   1 - 9   2020.4

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    DOI： 10.7566/JPSJ.89.044003

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  • Quantum control of all transitions among electronic spin 3 levels of nitrogen vacancy centers in diamond by external magnetic fields

    Yamaguchi Tatsuma, Matsuzaki Yuichiro, Watanabe Hideyuki, Mizuochi Norikazu, Ishi-Hayase Junko

    JSAP Annual Meetings Extended Abstracts   2020.1   1294 - 1294   2020.2

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    DOI： 10.11470/jsapmeeting.2020.1.0_1294

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  • Single spin detection with entangled states Reviewed

    Hakoshima Hideaki, Matsuzaki Yuichiro

    Japanese Journal of Applied Physics   1 - 5   2019.12

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    DOI： 10.7567/1347-4065/ab656a

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  • Quantum annealing with capacitive-shunted flux qubits Reviewed

    Matsuzaki Yuichiro, Hakoshima Hideaki, Seki Yuya, KAWABATA Shiro

    Japanese Journal of Applied Physics   1 - 4   2019.11

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    DOI： 10.7567/1347-4065/ab5b30

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  • Bandwidth analysis of AC magnetic field sensing based on electronic spin double-resonance of nitrogen-vacancy centers in diamond Reviewed

    Tatsuma Yamaguchi, Yuichiro Matsuzaki, Shiro Saito, Soya Saijo, Hideyuki Watanabe, Norikazu Mizuochi, Junko Ishi-Hayase

    JAPANESE JOURNAL OF APPLIED PHYSICS   58 ( 10 )   1 - 5   2019.10

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    DOI： 10.7567/1347-4065/ab3d03

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  • Quantum metrology with generalized cat states Reviewed

    Mamiko Tatsuta, Yuichiro Matsuzaki, Akira Shimizu

    Physical Review A   100 ( 3 )   1 - 10   2019.9

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    DOI： 10.1103/physreva.100.032318

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  • Realization of controllable open system with NMR Reviewed

    Le Bin Ho, Yuichiro Matsuzaki, Masayuki Matsuzaki, Yasushi Kondo

    New Journal of Physics   21 ( 9 )   093008 - 093008   2019.9

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  • Spectrum of the Dicke model in a superconducting qubit-oscillator system Reviewed

    Ashhab S, Matsuzaki Y, Kakuyanagi K, Saito S, Yoshihara F, Fuse T, Semba K

    PHYSICAL REVIEW A   99 ( 6 )   1 - 11   2019.6

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    DOI： 10.1103/PhysRevA.99.063822

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  • Electron paramagnetic resonance spectroscopy using a single artificial atom Reviewed

    Toida Hiraku, Matsuzaki Yuichiro, Kakuyanagi Kosuke, Zhu Xiaobo, Munro William J, Yamaguchi Hiroshi, Saito Shiro

    COMMUNICATIONS PHYSICS   2 ( 1 )   1 - 7   2019.3

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    DOI： 10.1038/s42005-019-0133-9

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  • Quantum remote sensing with asymmetric information gain Reviewed

    Takeuchi Yuki, Matsuzaki Yuichiro, Miyanishi Koichiro, Sugiyama Takanori, Munro William J

    PHYSICAL REVIEW A   99 ( 2 )   1 - 14   2019.2

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    DOI： 10.1103/PhysRevA.99.022325

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  • Demonstration of vector magnetic field sensing by simultaneous control of nitrogen-vacancy centers in diamond using multi-frequency microwave pulses Reviewed

    Ken Yahata, Yuichiro Matsuzaki, Shiro Saito, Hideyuki Watanabe, Junko Ishi-Hayase

    APPLIED PHYSICS LETTERS   114 ( 2 )   022404/1 - 022404/5   2019.1

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    DOI： 10.1063/1.5079925

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  • Optimization of Temperature Sensitivity Using the Optically Detected Magnetic-Resonance Spectrum of a Nitrogen-Vacancy Center Ensemble Reviewed

    Kan Hayashi, Yuichiro Matsuzaki, Takashi Taniguchi, Takaaki Shimo-Oka, Ippei Nakamura, Shinobu Onoda, Takeshi Ohshima, Hiroki Morishita, Masanori Fujiwara, Shiro Saito, Norikazu Mizuochi

    Physical Review Applied   10 ( 3 )   1 - 8   2018.9

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    DOI： 10.1103/PhysRevApplied.10.034009

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  • Frequency Response of Double Resonance of Sub-levels of Spin-triplet State of NV Centers in Diamond

    Yamaguchi Tatsuma, Matsuzaki Yuichiro, Saito Shiro, Watanabe Hideyuki, Mizuochi Norikazu, Ishi-Hayase Junko

    JSAP Annual Meetings Extended Abstracts   2018.2   1382 - 1382   2018.9

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    DOI： 10.11470/jsapmeeting.2018.2.0_1382

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  • AC magnetic field sensing using continuous-wave optically detected magnetic resonance of nitrogen-vacancy centers in diamond Reviewed

    Soya Saijo, Yuichiro Matsuzaki, Shiro Saito, Tatsuma Yamaguchi, Ikuya Hanano, Hideyuki Watanabe, Norikazu Mizuochi, Junko Ishi-Hayase

    APPLIED PHYSICS LETTERS   113 ( 8 )   1 - 5   2018.8

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    DOI： 10.1063/1.5024401

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  • Quantum Metrology beyond the Classical Limit under the Effect of Dephasing Reviewed

    Yuichiro Matsuzaki, Simon Benjamin, Shojun Nakayama, Shiro Saito, William J. Munro

    Physical Review Letters   120 ( 14 )   1 - 6   2018.4

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    DOI： 10.1103/PhysRevLett.120.140501

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  • Phonon-bottlenecked spin relaxation of Er3+:Y2SiO5 at sub-kelvin temperatures Reviewed

    Rangga P. Budoyo, Kosuke Kakuyanagi, Hiraku Toida, Yuichiro Matsuzaki, William J. Munro, Hiroshi Yamaguchi, Shiro Saito

    Applied Physics Express   11 ( 4 )   1 - 5   2018.4

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    DOI： 10.7567/APEX.11.043002

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  • Multi-Frequency Magnetic Field Vector Sensing using Nitrogen-Vacancy Centers in Diamond

    Yahata Ken, Matsuzaki Yuichiro, Saito Shiro, Watanabe Hideyuki, Ishi-Hayase Junko

    JSAP Annual Meetings Extended Abstracts   2018.1   1466 - 1466   2018.3

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  • Temperature sensing with an ensemble of nitrogen vacancy centers

    Hayashi Kan, Matsuzaki Yuichiro, Shimo-Oka Takaaki, Nakamura Ippei, Morishita Hiroki, Fujiwara Masanori, Saito Shiro, Mizuochi Norikazu

    JSAP Annual Meetings Extended Abstracts   2018.1   1473 - 1473   2018.3

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  • Electron paramagnetic resonance spectroscopy of Er3+:Y2SiO5 using a Josephson bifurcation amplifier: Observation of hyperfine and quadrupole structures Reviewed

    Budoyo Rangga P, Kakuyanagi Kosuke, Toida Hiraku, Matsuzaki Yuichiro, Munro William J, Yamaguchi Hiroshi, Saito Shiro

    PHYSICAL REVIEW MATERIALS   2 ( 1 )   1 - 6   2018.1

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    DOI： 10.1103/PhysRevMaterials.2.011403

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  • Vector-magnetic-field sensing via multifrequency control of nitrogen-vacancy centers in diamond Reviewed

    Sayaka Kitazawa, Yuichiro Matsuzaki, Soya Saijo, Kosuke Kakuyanagi, Shiro Saito, Junko Ishi-Hayase

    PHYSICAL REVIEW A   96 ( 4 )   1 - 11   2017.10

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    DOI： 10.1103/PhysRevA.96.042115

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  • Engineered noisy environment for studying decoherence Reviewed

    Ai Iwakura, Yuichiro Matsuzaki, Yasushi Kondo

    PHYSICAL REVIEW A   96 ( 3 )   1 - 11   2017.9

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    DOI： 10.1103/PhysRevA.96.032303

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  • AC magnetic field sensing using continuous-wave optically detected magnetic resonace of NV centers in diamond

    Saijo Soya, Matsuzaki Yuichiro, Saito Shiro, Watanabe Hideyuki, Mizuochi Norikazu, Ishi-Hayase Junko

    JSAP Annual Meetings Extended Abstracts   2017.2   1295 - 1295   2017.8

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    DOI： 10.11470/jsapmeeting.2017.2.0_1295

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  • Temperature sensing with an ensemble of nitrogen vacancy centers

    hayashi kan, matsuzaki yuichiro, shimo-oka takaaki, nakamura ippei, morishita hiroki, fujiwara masanori, saito shiro, mizuochi norikazu

    JSAP Annual Meetings Extended Abstracts   2017.2   1296 - 1296   2017.8

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    DOI： 10.11470/jsapmeeting.2017.2.0_1296

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  • Calculation of sensitivity for current sensing using nitrogen-vacancy centers in diamond

    Oribe Yuya, Saijo Soya, Watanabe Hideyuki, Matsuzaki Yuichiro, Ishi-Hayase Junko

    JSAP Annual Meetings Extended Abstracts   2017.2   1293 - 1293   2017.8

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    DOI： 10.11470/jsapmeeting.2017.2.0_1293

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  • Coherent coupling between 4300 superconducting flux qubits and a microwave resonator

    Yuichiro Matsuzaki, Kosuke Kakuyanagi, Hiraku Toida, Hiroshi Yamaguchi, William John Munro, And Shiro Saito

    NTT Technical Review   15 ( 7 )   2017.7

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  • Demonstration of realism violation on a macroscopic scale

    Kosuke Kakuyanagi, Yuichiro Matsuzaki, Hiraku Toida, Hiroshi Yamaguchi, Shiro Saito, And William John Munro

    NTT Technical Review   15 ( 7 )   2017.7

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  • Projective measurement of energy on an ensemble of qubits with unknown frequencies Reviewed

    Yuichiro Matsuzaki, Shojun Nakayama, Akihito Soeda, Shiro Saito, Mio Murao

    PHYSICAL REVIEW A   95 ( 6 )   1 - 6   2017.6

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    DOI： 10.1103/PhysRevA.95.062106

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  • Magnetic-field sensing with quantum error detection under the effect of energy relaxation Reviewed

    Yuichiro Matsuzaki, Simon Benjamin

    PHYSICAL REVIEW A   95 ( 3 )   1 - 8   2017.3

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    DOI： 10.1103/PhysRevA.95.032303

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  • Superradiance with an ensemble of superconducting flux qubits Reviewed

    Neill Lambert, Yuichiro Matsuzaki, Kosuke Kakuyanagi, Natsuko Ishida, Shiro Saito, Franco Nori

    PHYSICAL REVIEW B   94 ( 22 )   1 - 8   2016.12

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    DOI： 10.1103/PhysRevB.94.224510

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  • A strict experimental test of macroscopic realism in a superconducting flux qubit Reviewed

    George C. Knee, Kosuke Kakuyanagi, Mao-Chuang Yeh, Yuichiro Matsuzaki, Hiraku Toida, Hiroshi Yamaguchi, Shiro Saito, Anthony J. Leggett, William J. Munro

    NATURE COMMUNICATIONS   7   1 - 5   2016.11

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    DOI： 10.1038/ncomms13253

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  • Observation of Collective Coupling between an Engineered Ensemble of Macroscopic Artificial Atoms and a Superconducting Resonator Reviewed

    Kosuke Kakuyanagi, Yuichiro Matsuzaki, Corentin Deprez, Hiraku Toida, Kouichi Semba, Hiroshi Yamaguchi, William J. Munro, Shiro Saito

    PHYSICAL REVIEW LETTERS   117 ( 21 )   1 - 6   2016.11

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    DOI： 10.1103/PhysRevLett.117.210503

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  • Hybrid quantum magnetic-field sensor with an electron spin and a nuclear spin in diamond Reviewed

    Yuichiro Matsuzaki, Takaaki Shimo-Oka, Hirotaka Tanaka, Yasuhiro Tokura, Kouichi Semba, Norikazu Mizuochi

    PHYSICAL REVIEW A   94 ( 5 )   1 - 6   2016.11

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    DOI： 10.1103/PhysRevA.94.052330

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  • Characterization and Control of Measurement-Induced Dephasing on Superconducting Flux Qubit with a Josephson Bifurcation Amplifier Reviewed

    Kosuke Kakuyanagi, Yuichiro Matsuzaki, Tatsuya Baba, Hayato Nakano, Shiro Saito, Kouichi Semba

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   85 ( 10 )   1 - 4   2016.10

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    DOI： 10.7566/JPSJ.85.104801

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  • Coherent Dynamics of Nitrogen-Vacancy Centers in Diamond Interacting with Isotopically-enriched Nitrogen Nuclear Spins

    FUJITA RYUUSHIROU, HANANO IKUYA, UESUGI SYUHEI, WATANABE HIDEYUKI, MATSUZAKI YUICHIRO, ISHI-HAYASE JUNKO, AKAHANE KOUICHI

    JSAP Annual Meetings Extended Abstracts   2016.2   1243 - 1243   2016.9

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    DOI： 10.11470/jsapmeeting.2016.2.0_1243

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  • Optically detected magnetic resonance of high-density ensemble of NV- centers in diamond Reviewed

    Y. Matsuzaki, H. Morishita, T. Shimooka, T. Tashima, K. Kakuyanagi, K. Semba, W. J. Munro, H. Yamaguchi, N. Mizuochi, S. Saito

    JOURNAL OF PHYSICS-CONDENSED MATTER   28 ( 27 )   1 - 9   2016.7

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    DOI： 10.1088/0953-8984/28/27/275302

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  • A hybrid-systems approach to spin squeezing using a highly dissipative ancillary system Reviewed

    Shane Dooley, Emi Yukawa, Yuichiro Matsuzaki, George C. Knee, William J. Munro, Kae Nemoto

    NEW JOURNAL OF PHYSICS   18   1 - 20   2016.5

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    DOI： 10.1088/1367-2630/18/5/053011

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  • Electron paramagnetic resonance spectroscopy using a direct current-SQUID magnetometer directly coupled to an electron spin ensemble Reviewed

    Hiraku Toida, Yuichiro Matsuzaki, Kosuke Kakuyanagi, Xiaobo Zhu, William J. Munro, Kae Nemoto, Hiroshi Yamaguchi, Shiro Saito

    APPLIED PHYSICS LETTERS   108 ( 5 )   1 - 5   2016.2

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    DOI： 10.1063/1.4940978

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  • Using the quantum Zeno effect for suppression of decoherence Reviewed

    Yasushi Kondo, Yuichiro Matsuzaki, Kei Matsushima, Jefferson G. Filgueiras

    NEW JOURNAL OF PHYSICS   18   1 - 12   2016.1

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    DOI： 10.1088/1367-2630/18/1/013033

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  • Quantum Zeno Effect in an Unstable System with NMR Reviewed

    Yuichiro Matsuzaki, Hirotaka Tanaka

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   85 ( 1 )   1 - 7   2016.1

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    DOI： 10.7566/JPSJ.85.014001

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  • Hybridization: A route to state engineering for quantum-enhanced metrology

    William J. Munro, Shane Dooley, Emi Yukawa, Yuichiro Matsuzaki, Kae Nemoto

    2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)   2016

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  • Superconductor-diamond hybrid quantum system Invited

    Kouichi Semba, Fumiki Yoshihara, Jan E. S. Johansson, Xiaobo Zhu, Norikazu Mizuochi, William J. Munro, Shiro Saito, Kosuke Kakuyanagi, Yuichiro Matsuzaki

    Lecture Notes in Physics   911   515 - 538   2016

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    DOI： 10.1007/978-4-431-55756-2_24

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  • Parity measurement of remote qubits using dispersive coupling and photodetection Reviewed

    J. Govenius, Y. Matsuzaki, I. G. Savenko, M. Möttönen

    Physical Review A - Atomic, Molecular, and Optical Physics   92 ( 4 )   1 - 9   2015.10

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    DOI： 10.1103/PhysRevA.92.042305

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  • Spin Amplification in an Inhomogeneous System Reviewed

    Suguru Endo, Yuichiro Matsuzaki, William J. Munro, Tatsuhiko Koike, Shiro Saito

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   84 ( 10 )   1 - 4   2015.10

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    DOI： 10.7566/JPSJ.84.103001

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  • Proposed Robust Entanglement-Based Magnetic Field Sensor Beyond the Standard Quantum Limit Reviewed

    Tohru Tanaka, Paul Knott, Yuichiro Matsuzaki, Shane Dooley, Hiroshi Yamaguchi, William J. Munro, Shiro Saito

    PHYSICAL REVIEW LETTERS   115 ( 17 )   1 - 6   2015.10

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    DOI： 10.1103/PhysRevLett.115.170801

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  • Analysis of the spectroscopy of a hybrid system composed of a superconducting flux qubit and diamond NV- centers Reviewed

    H. Cai, Y. Matsuzaki, K. Kakuyanagi, H. Toida, X. Zhu, N. Mizuochi, K. Nemoto, K. Semba, W. J. Munro, S. Saito, H. Yamaguchi

    JOURNAL OF PHYSICS-CONDENSED MATTER   27 ( 34 )   1 - 16   2015.9

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    DOI： 10.1088/0953-8984/27/34/345702

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  • Observation of quantum Zeno effect in a superconducting flux qubit Reviewed

    K. Kakuyanagi, T. Baba, Y. Matsuzaki, H. Nakano, S. Saito, K. Semba

    NEW JOURNAL OF PHYSICS   17   1 - 11   2015.6

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    DOI： 10.1088/1367-2630/17/6/063035

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  • Scalable quantum computation architecture using always-on Ising interactions via quantum feedforward Reviewed

    Takahiko Satoh, Yuichiro Matsuzaki, Kosuke Kakuyanagi, William J. Munro, Koichi Semba, Hiroshi Yamaguchi, Shiro Saito

    PHYSICAL REVIEW A   91 ( 5 )   1 - 6   2015.5

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    DOI： 10.1103/PhysRevA.91.052329

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  • Improving the lifetime of the nitrogen-vacancy-center ensemble coupled with a superconducting flux qubit by applying magnetic fields Reviewed

    Yuichiro Matsuzaki, Xiaobo Zhu, Kosuke Kakuyanagi, Hiraku Toida, Takaaki Shimooka, Norikazu Mizuochi, Kae Nemoto, Kouichi Semba, W. J. Munro, Hiroshi Yamaguchi, Shiro Saito

    Physical Review A   91 ( 4 )   2015.4

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physreva.91.042329

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevA.91.042329/fulltext

  • Improving the Coherence Time of a Quantum System via a Coupling to a Short-Lived System Reviewed

    Yuichiro Matsuzaki, Xiaobo Zhu, Kosuke Kakuyanagi, Hiraku Toida, Takaaki Shimo-Oka, Norikazu Mizuochi, Kae Nemoto, Kouichi Semba, William J. Munro, Hiroshi Yamaguchi, Shiro Saito

    PHYSICAL REVIEW LETTERS   114 ( 12 )   1 - 5   2015.3

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    DOI： 10.1103/PhysRevLett.114.120501

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  • Hybridization: When two wrongs make a right

    William J. Munro, Yuichiro Matsuzaki, Hiraku Toida, Kosuke Kakuyanagi, Norikazu Mizuochi, Kae Nemoto, Kouichi Semba, Hiroshi Yamaguchi, Shiro Saito

    2015 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)   2015

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  • Observation of dark states in a superconductor diamond quantum hybrid system Reviewed

    Xiaobo Zhu, Yuichiro Matsuzaki, Robert Amsuess, Kosuke Kakuyanagi, Takaaki Shimo-Oka, Norikazu Mizuochi, Kae Nemoto, Kouichi Semba, William J. Munro, Shiro Saito

    NATURE COMMUNICATIONS   5   1 - 6   2014.4

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    DOI： 10.1038/ncomms4524

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  • Long-lived dark states in a superconductor diamond hybrid quantum system

    William J. Munro, Xiaobo Zhu, Yuichiro Matsuzaki, Robert Amsuess, Kosuke Kakuyanagi, Takaaki Shimo-Oka, Norikazu Mizuochi, Kae Nemoto, Kouichi Semba, Shiro Saito

    2014 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)   2014

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  • Towards Realizing a Quantum Memory for a Superconducting Qubit: Storage and Retrieval of Quantum States Reviewed

    Shiro Saito, Xiaobo Zhu, Robert Amsuess, Yuichiro Matsuzaki, Kosuke Kakuyanagi, Takaaki Shimo-Oka, Norikazu Mizuochi, Kae Nemoto, William J. Munro, Kouichi Semba

    PHYSICAL REVIEW LETTERS   111 ( 10 )   1 - 5   2013.9

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    DOI： 10.1103/PhysRevLett.111.107008

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  • Necessity of Superposition of Macroscopically Distinct States for Quantum Computational Speedup Reviewed

    Akira Shimizu, Yuichiro Matsuzaki, Akihisa Ukena

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   82 ( 5 )   1 - 16   2013.5

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    DOI： 10.7566/JPSJ.82.054801

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  • Hybridization of superconducting flux qubits and diamond ensembles: a route to local gates for quantum repeaters

    William J. Munro, Xiaobo Zhu, Yuichiro Matsuzaki, Ashley M. Stephens, Kae Nemoto, Shiro Saito

    QUANTUM COMMUNICATIONS AND QUANTUM IMAGING XI   8875   2013

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    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1117/12.2022602

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  • Hybridization of superconducting flux qubits and diamond ensembles

    William J. Munro, Shiro Saito, Xiaobo Zhu, Yuichiro Matsuzaki, Robert Amsuess, Kosuke Kakuyanagi, Takaaki Shimo-Oka, Norikazu Mizuochi, Kae Nemoto, Kouichi Semba

    2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)   2013

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  • Quantum communication utilizing cavity-based quantum devices

    Kae Nemoto, A. Stephens, S. Devitt, M. Everitt, J. Schmiedmayer, M. Trupke, S. Saito, Y. Matsuzaki, A. SaiToh, K. Harrison, W. J. Munro

    2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR)   WPG-15, IEEE - [2pages]   2013

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    DOI： 10.1109/CLEOPR.2013.6600612

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  • Enhanced energy relaxation process of a quantum memory coupled to a superconducting qubit Reviewed

    Yuichiro Matsuzaki, Hayato Nakano

    PHYSICAL REVIEW B   86 ( 18 )   1 - 7   2012.11

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    DOI： 10.1103/PhysRevB.86.184501

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  • Entangling homogeneously broadened matter qubits in the weak-coupling cavity-QED regime Reviewed

    Kazuki Koshino, Yuichiro Matsuzaki

    PHYSICAL REVIEW A   86 ( 2 )   1 - 5   2012.8

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    DOI： 10.1103/PhysRevA.86.020305

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  • Quantum entanglement distribution using a magnetic field sensor Reviewed

    M. Schaffry, S. C. Benjamin, Y. Matsuzaki

    NEW JOURNAL OF PHYSICS   14   1 - 16   2012.2

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    DOI： 10.1088/1367-2630/14/2/023046

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  • Entanglement generation between unstable optically active qubits without photodetectors Reviewed

    Yuichiro Matsuzaki, Paolo Solinas, Mikko Mottonen

    PHYSICAL REVIEW A   84 ( 3 )   1 - 5   2011.9

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    DOI： 10.1103/PhysRevA.84.032338

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  • Magnetic field sensing beyond the standard quantum limit under the effect of decoherence Reviewed

    Yuichiro Matsuzaki, Simon C. Benjamin, Joseph Fitzsimons

    PHYSICAL REVIEW A   84 ( 1 )   1 - 5   2011.7

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    DOI： 10.1103/PhysRevA.84.012103

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  • Entangling unstable optically active matter qubits Reviewed

    Yuichiro Matsuzaki, Simon C. Benjamin, Joseph Fitzsimons

    PHYSICAL REVIEW A   83 ( 6 )   1 - 4   2011.6

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    DOI： 10.1103/PhysRevA.83.060303

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  • Quantum Zeno effect with a superconducting qubit Reviewed

    Y. Matsuzaki, S. Saito, K. Kakuyanagi, K. Semba

    PHYSICAL REVIEW B   82 ( 18 )   1 - 4   2010.11

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    DOI： 10.1103/PhysRevB.82.180518

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  • Distributed quantum computation with arbitrarily poor photon detection Reviewed

    Yuichiro Matsuzaki, Simon C. Benjamin, Joseph Fitzsimons

    PHYSICAL REVIEW A   82 ( 1 )   1 - 4   2010.7

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    DOI： 10.1103/PhysRevA.82.010302

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  • Probabilistic Growth of Large Entangled States with Low Error Accumulation Reviewed

    Yuichiro Matsuzaki, Simon C. Benjamin, Joseph Fitzsimons

    PHYSICAL REVIEW LETTERS   104 ( 5 )   1 - 4   2010.2

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    DOI： 10.1103/PhysRevLett.104.050501

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▼display all

Books

  • Robust Quantum Sensing

    Yuichiro Matsuzaki

    Springer, Singapore  2022.1 

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  • 量子センシングハンドブック (量子科学技術が切り拓く新たな領域)

    根来 誠, 八巻 徹也, 波多野 睦子, 寺地 徳之, 大島 武, 小野田 忍, 山﨑 雄一, 水落 憲和, 白川 昌宏, 五十嵐 龍治, 藤原 正澄, 中台(鹿毛) 枝里子, 湯川 博, 馬場 嘉信, 久保 結丸, 冨永 雄介, 武田 和行, 金田 文寛, 清水 亮介, 枝松 圭一, 三木 茂人, 山下 太郎, 髙本 将男, 香取 秀俊, 中川 賢一, 柴田 康介, 平野 琢也, 宗宮 健太郎, 齊藤 志郎, 今田 裕 金 有洙, 谷口 正輝, 井元 信之, 藤原 彰夫, 小野 貴史, 松崎 雄一郎（ Role： Contributor第五章 量子センシング理論 第4節 量子もつれを用いた磁場センサの理論）

    エヌ・ティー・エス  2021.3 

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  • 量子力学現象を利用した革新的コンピュータ

    松崎雄一郎, 川畑史郎

    2020.3 

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  • Superconductor-Diamond Hybrid Quantum System

    Kouichi Semba, Fumiki Yoshihara, Jan E. S. Johansson, Xiaobo Zhu, Norikazu Mizuochi, William J. Munro, Shiro Saito, Kosuke Kakuyanagi, Yuichiro Matsuzaki

    Springer  2016  （ ISBN:9784431557555 ）

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    Total pages：xi, 624 p.   Language：English  

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MISC

  • Anonymous estimation of intensity distribution of magnetic fields with quantum sensing network

    Hiroto Kasai, Yuki Takeuchi, Yuichiro Matsuzaki, Yasuhiro Tokura

    2023.5

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    Language：English   Publisher：arXiv  

    A quantum sensing network is used to simultaneously detect and measure
    physical quantities, such as magnetic fields, at different locations. However,
    there is a risk that the measurement data is leaked to the third party during
    the communication. Many theoretical and experimental efforts have been made to
    realize a secure quantum sensing network where a high level of security is
    guaranteed. In this paper, we propose a protocol to estimate statistical
    quantities of the target fields at different places without knowing individual
    value of the target fields. We generate an enanglement between $L$ quantum
    sensors, let the quantum sensor interact with local fields, and perform
    specific measurements on them. By calculating the quantum Fisher information to
    estimate the individual value of the magnetic fields, we show that we cannot
    obtain any information of the value of the individual fields in the limit of
    large $L$. On the other hand, in our protocol, we can estimate theoretically
    any moment of the field distribution by measuring a specific observable and
    evaluated relative uncertainty of $k$-th ($k=1,2,3,4$) order moment. Our
    results are a significant step towards using a quantum sensing network with
    security inbuilt.

    DOI： 10.48550/ARXIV.2305.14119

    arXiv

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    Other Link： http://arxiv.org/pdf/2305.14119v1

  • Variational secure cloud quantum computing

    神宮裕汰, 神宮裕汰, 竹内勇貴, 遠藤傑, 川畑史郎, 渡部昌平, 二国徹郎, 箱嶋秀昭, 箱嶋秀昭, 松崎雄一郎

    日本物理学会講演概要集(CD-ROM)   77 ( 1 )   2022

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  • Analysis of the shortest vector problems with the quantum annealing to search the excited states

    浦優輝, 浦優輝, 井元隆史, 渡部昌平, 二国徹郎, 松崎雄一郎, 川畑史郎

    日本物理学会講演概要集(CD-ROM)   77 ( 1 )   2022

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  • Calculation of the Partition function on NISQ devices

    松本佳大, 松本佳大, 神宮裕汰, 神宮裕汰, 遠藤傑, 川畑史郎, 渡部昌平, 二国徹郎, 松崎雄一郎, 箱嶋秀昭

    日本物理学会講演概要集(CD-ROM)   76 ( 1 )   2021

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  • Calculation of the Partition function on NISQ devices

    松本佳大, 松本佳大, 神宮裕汰, 神宮裕汰, 遠藤傑, 川畑史郎, 渡部昌平, 二国徹郎, 箱嶋秀昭, 松崎雄一郎

    日本物理学会講演概要集(CD-ROM)   76 ( 2 )   2021

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  • Innovative Computing with Quantum Mechanical Phenomena

    The journal of the Institute of Electronics, Information and Communication Engineers   103 ( 3 )   267 - 274   2020.3

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  • 量子ビット操作で超高感度磁気センサー

    松崎 雄一郎

    パリティ = Parity : 物理科学雑誌   32 ( 11 )   54 - 57   2017.11

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    Language：Japanese   Publisher：丸善出版  

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  • 4300個の超伝導磁束量子ビットとマイクロ波共振器の協調的な結合 (特集 量子情報処理技術における新時代の到来)

    松崎 雄一郎, 角柳 孝輔, 樋田 啓, 山口 浩司, Munro William J, 齊藤 志郎

    NTT技術ジャーナル   29 ( 5 )   24 - 27   2017.5

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  • 巨視的スケールでの実在性の破れを実証 (特集 量子情報処理技術における新時代の到来)

    角柳 孝輔, 松崎 雄一郎, 樋田 啓, 山口 浩司, 齊藤 志郎, Munro William J

    NTT技術ジャーナル   29 ( 5 )   20 - 23   2017.5

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  • AC Current Sensing using Oriention-controlled Nitrogen-Vacancy Centers in Diamond

    Saijo Soya, Fujita Ryushiro, Hanano Ikuya, Kitazawa Sayaka, Watanabe Hideyuki, Akahane Kouichi, Matsuzaki Yuichiro, Ishi-Hayase Junko

    JSAP Annual Meetings Extended Abstracts   2016.2   1252 - 1252   2016.9

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    Language：Japanese   Publisher：The Japan Society of Applied Physics  

    DOI： 10.11470/jsapmeeting.2016.2.0_1252

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  • Micrometer-Scale Electron Paramagnetic Resonance Spectroscopy Using a Superconducting Flux Qubit

    Toida Hiraku, Matsuzaki Yuichiro, Kakuyanagi Kosuke, Nemoto Kae, Munro William J, Yamaguchi Hiroshi, Saito Shiro

    Meeting Abstracts of the Physical Society of Japan   71 ( 0 )   476 - 476   2016

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    &lt;p&gt;超伝導磁束量子ビットと電子スピン集団とを直接貼り合わせ結合することで電子スピン共鳴分光を行った。実験結果からの見積もりにより、この手法の感度は1000スピン/{\sqrt{Hz } }以下、検出体積は0.05 pL程度との結果を得た。&lt;/p&gt;

    DOI： 10.11316/jpsgaiyo.71.2.0_476

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  • Quantum Magnetic Field Sensing beyond the Classical Limit

    Matsuzaki Yuichiro

    Butsuri   71 ( 11 )   757 - 761   2016

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    &lt;p&gt;Here, we have studied the performance of an entanglement sensor under the effect of non-Markovian dephasing that is the dominant source of decoherence in solid-state systems. We have shown that one can actually sense a magnetic field with an accuracy far beyond the classical limit in realistic conditions. Our scheme could pave the way to realize a practical entanglement sensor.&lt;/p&gt;

    DOI： 10.11316/butsuri.71.11_757

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  • 16aPS-114 ESR spectroscopy using a SQUID magnetometer

    Toida H, Matsuzaki Y, Kakuyanagi K, Nemoto K, W. J. Munro, Yamaguchi H, Saito S

    Meeting Abstracts of the Physical Society of Japan   70 ( 0 )   788 - 788   2015

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    DOI： 10.11316/jpsgaiyo.70.2.0_788

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  • 18aAC-9 Enhancement of the spin coherence time in NV center under electric field

    Kobayashi S, Morishita H, Matsuzaki Y, Miwa S, Suzuki Y, Mizuochi N

    Meeting Abstracts of the Physical Society of Japan   70 ( 0 )   541 - 541   2015

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    DOI： 10.11316/jpsgaiyo.70.2.0_541

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  • 18aAC-2 Towards the realization of ultrastrong coupling between superconducting flux qubits and a microwave cavity (Experiment)

    Kakuyanagi K, Matsuzaki Y, Toida H, Munro W. J, Semba K, Yamaguchi H, Saito S

    Meeting Abstracts of the Physical Society of Japan   70 ( 0 )   535 - 535   2015

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  • 21aAN-5 Suppression of Decoherence by Using Quantum Zeno Effect

    Kondo Y, Matsuzaki Y, Matsushima K, Filgueiras J. G

    Meeting Abstracts of the Physical Society of Japan   70 ( 0 )   577 - 577   2015

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    DOI： 10.11316/jpsgaiyo.70.1.0_577

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  • 18aAC-1 Towards the realization of ultrastrong coupling between superconducting flux qubits and a microwave cavity (Theory)

    Matsuzaki Y, Kakuyanagi K, Lambert N, Ishida N, Toida H, Munro W. J, Semba K, Yamaguchi H, Saito S

    Meeting Abstracts of the Physical Society of Japan   70 ( 0 )   534 - 534   2015

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    DOI： 10.11316/jpsgaiyo.70.2.0_534

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  • 24aAN-6 Improving the coherence time of a quantum system via a coupling with an unstable system

    Matsuzaki Y, Zhu X, Kakuyanagi K, Toida H, Shimooka T, Mizuochi N, Nemoto K, Semba K, Munro W. J, Yamaguchi H, Saito S

    Meeting Abstracts of the Physical Society of Japan   70 ( 0 )   753 - 753   2015

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    DOI： 10.11316/jpsgaiyo.70.1.0_753

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  • 16pAC-6 Spin Amplification with Inhomogeneous Broadening

    Endo S, Matsuzaki Y, Munro W.J, Saito Shiro

    Meeting Abstracts of the Physical Society of Japan   70 ( 0 )   469 - 469   2015

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    DOI： 10.11316/jpsgaiyo.70.2.0_469

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  • Superconducting Qubit-spin Ensemble Quantum Hybrid System

    SAITO Shiro, MATSUZAKI Yuichiro, MUNRO William J, SEMBA Kouichi

    The Journal of the Institute of Electronics, Information, and Communication Engineers   97 ( 9 )   799 - 805   2014.9

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    Language：Japanese   Publishing type：Book review, literature introduction, etc.   Publisher：The Institute of Electronics, Information and Communication Engineers  

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  • 9aAZ-8 Towards Realizing a Spin Echo with a Coupled System of NV Centers and Superconducting Flux Qubit

    Tanaka Saki, Matsuzaki Yuichiro, Kakuyanagi Kosuke, Munro William J, Yamaguchi Hiroshi, Saito Shiro

    Meeting abstracts of the Physical Society of Japan   69 ( 2 )   84 - 84   2014.8

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  • 10pAZ-3 Improving the Precision of the Magnetic Field Sensor via Spin Squeezing under the Effect of Decoherence

    Tanaka T, Matsuzaki Y, Knott P. A, Dooley S, Munro W. J, Yamaguchi H, Saito S

    Meeting abstracts of the Physical Society of Japan   69 ( 2 )   108 - 108   2014.8

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  • 10pAZ-2 Robust magnetic field sensing with spin cat states beyond the standard quantum limit

    Matsuzaki Y, Tanaka T, Knott P. A, Dooley S, Munro W. J, Yamaguchi H, Saito S

    Meeting abstracts of the Physical Society of Japan   69 ( 2 )   108 - 108   2014.8

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  • 27aCC-9 The role of quantum memory in a distributed quantum computing

    Tanaka S, Matsuzaki Y, Fuji K, Zhu Xiaobo, Amsuss Rober, Kakuyanagi K, Shimooka T, Mizuochi N, Nemoto K, Munro William J, Semba K, Saito S

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   169 - 169   2014.3

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  • 27aCC-10 Toward the realization of Icing interaction between capacitively coupled superconducting flux qubits

    Satoh T, Matsuzaki Y, Kakuyanagi K, Fujii K, Semba K, Saito S

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   169 - 169   2014.3

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  • 27aCC-8 Distributed quantum computation with superconducting circuits and electron spin ensembles

    Matsuzaki Y, Fujii K, Tanaka S, Zhu Xiaobo, Amsuss Robert, Kakuyanagi K, Shimooka T, Mizuochi N, Nemoto K, Munro W. J, Semba K, Saito S

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   168 - 168   2014.3

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  • 27aCC-12 Theory of microwave response of a circuit QED system in the strong dispersive regime

    Billangeon Pierre-Marie

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   2014.3

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    J-GLOBAL

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  • 10pAZ-3 Improving the Precision of the Magnetic Field Sensor via Spin Squeezing under the Effect of Decoherence

    Tanaka T, Matsuzaki Y, Knott P. A, Dooley S, Munro W. J, Yamaguchi H, Saito S

    Meeting Abstracts of the Physical Society of Japan   69 ( 0 )   2014

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  • 10pAZ-2 Robust magnetic field sensing with spin cat states beyond the standard quantum limit

    Matsuzaki Y, Tanaka T, Knott P. A, Dooley S, Munro W. J, Yamaguchi H, Saito S

    Meeting Abstracts of the Physical Society of Japan   69 ( 0 )   2014

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  • 27aCC-8 Distributed quantum computation with superconducting circuits and electron spin ensembles

    Matsuzaki Y, Fujii K, Tanaka S, Zhu Xiaobo, Amsuss Robert, Kakuyanagi K, Shimooka T, Mizuochi N, Nemoto K, Munro W. J, Semba K, Saito S

    Meeting Abstracts of the Physical Society of Japan   69 ( 0 )   2014

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  • 27aCC-10 Toward the realization of Icing interaction between capacitively coupled superconducting flux qubits

    Satoh T, Matsuzaki Y, Kakuyanagi K, Fujii K, Semba K, Saito S

    Meeting Abstracts of the Physical Society of Japan   69 ( 0 )   2014

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  • 27aCC-12 Theory of microwave response of a circuit QED system in the strong dispersive regime

    Billangeon Pierre-Marie

    Meeting Abstracts of the Physical Society of Japan   69 ( 0 )   2014

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    J-GLOBAL

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  • 9aAZ-8 Towards Realizing a Spin Echo with a Coupled System of NV Centers and Superconducting Flux Qubit

    Tanaka Saki, Matsuzaki Yuichiro, Kakuyanagi Kosuke, Munro William J, Yamaguchi Hiroshi, Saito Shiro

    Meeting Abstracts of the Physical Society of Japan   69 ( 0 )   2014

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  • 27aCC-9 The role of quantum memory in a distributed quantum computing

    Tanaka S, Matsuzaki Y, Fuji K, Zhu Xiaobo, Amsuss Rober, Kakuyanagi K, Shimooka T, Mizuochi N, Nemoto K, Munro William J, Semba K, Saito S

    Meeting Abstracts of the Physical Society of Japan   69 ( 0 )   2014

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  • Interaction control using quantum feedback in solid-state qubits

    Satoh T, Matsuzaki Y, Fujii K, Kakuyanagi K, Semba K, Saito S

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   126 - 126   2013.8

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  • Spectroscopy of a hybrid system of a superconducting flux quit and an electron spin ensemble in diamond : a theoretical analysis

    Matsuzaki Y, Zhu Xiaboo, Amsuss Robert, Kakuyanagi K, Shimo-Oka T, Mizuochi N, Nemoto K, Munro William J, Semba K, Saito S

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   2013.8

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  • Spectroscopy of a hybrid system of a superconducting flux qubit and an electron spin ensemble in diamond (Experimental results)

    Saito S, Zhu Xiaboo, Amsuss Robert, Matsuzaki Y, Kakuyanagi K, Shimo-Oka T, Mizuochi N, Nemoto K, Munro William J, Semba K

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   2013.8

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  • Quantum magnetic field sensor with an electron spin and a nuclear spin in diamond

    Matsuzaki Yuichiro, Shimo-oka Takaaki, Tanaka Hirotaka, Tokura Yasuhiro, Semba Kouichi, Mizuochi Norikazu

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   134 - 134   2013.8

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  • Visibility improvement of quantum measurement by quantum non-demolition measurement

    Kakuyanagi Kosuke, Matsuzaki Yuichiro, Nakano Hayato, Semba Kouichi, Saito Shiro

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   126 - 126   2013.8

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  • 27pED-9 Quantum memory operations in a superconductor-diamond hybrid system

    Saito S, Zhu Xiaobo, Amsuss Robert, Matsuzaki Y, Kakuyanagi K, Shimo-Oka T, Mizuochi N, Nemoto K, Munro William J, Semba K

    Meeting abstracts of the Physical Society of Japan   68 ( 1 )   218 - 218   2013.3

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  • Visibility improvement of quantum measurement by quantum non-demolition measurement

    Kakuyanagi Kosuke, Matsuzaki Yuichiro, Nakano Hayato, Semba Kouichi, Saito Shiro

    Meeting Abstracts of the Physical Society of Japan   68 ( 0 )   2013

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  • Spectroscopy of a hybrid system of a superconducting flux qubit and an electron spin ensemble in diamond (Experimental results)

    Saito S, Zhu Xiaboo, Amsuss Robert, Matsuzaki Y, Kakuyanagi K, Shimo-Oka T, Mizuochi N, Nemoto K, Munro William J, Semba K

    Meeting Abstracts of the Physical Society of Japan   68 ( 0 )   2013

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  • Quantum magnetic field sensor with an electron spin and a nuclear spin in diamond

    Matsuzaki Yuichiro, Shimo-oka Takaaki, Tanaka Hirotaka, Tokura Yasuhiro, Semba Kouichi, Mizuochi Norikazu

    Meeting Abstracts of the Physical Society of Japan   68 ( 0 )   2013

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  • Spectroscopy of a hybrid system of a superconducting flux quit and an electron spin ensemble in diamond : a theoretical analysis

    Matsuzaki Y, Zhu Xiaboo, Amsuss Robert, Kakuyanagi K, Shimo-Oka T, Mizuochi N, Nemoto K, Munro William J, Semba K, Saito S

    Meeting Abstracts of the Physical Society of Japan   68 ( 0 )   2013

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  • Interaction control using quantum feedback in solid-state qubits

    Satoh T, Matsuzaki Y, Fujii K, Kakuyanagi K, Semba K, Saito S

    Meeting Abstracts of the Physical Society of Japan   68 ( 0 )   2013

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  • Hybrid system composed of a superconducting flux qubit and an electron spin ensemble in diamond: a theoretical analysis

    Y. Matsuzaki, S. Saito, X. Zhu, R. Amsuss, K. Kakuyanagi, T. Shimooka, N. Mizuochi, K. Nemoto, W. J. Munro, K. Semba

    2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR)   68 ( 1 )   2013

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  • 27pED-9 Quantum memory operations in a superconductor-diamond hybrid system

    Saito S, Zhu Xiaobo, Amsuss Robert, Matsuzaki Y, Kakuyanagi K, Shimo-Oka T, Mizuochi N, Nemoto K, Munro William J, Semba K

    Meeting Abstracts of the Physical Society of Japan   68 ( 0 )   2013

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  • Hybrid system composed of a superconducting flux qubit and an electron spin ensemble in diamond: a theoretical analysis

    Y. Matsuzaki, S. Saito, X. Zhu, R. Amsuss, K. Kakuyanagi, T. Shimooka, N. Mizuochi, K. Nemoto, W. J. Munro, K. Semba

    2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR)   68 ( 0 )   2013

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  • Distributed quantum computation with arbitrarily poor photon detection

    松崎 雄一郎, Benjamin Simon C, Fitzsimons Joseph

    量子情報技術研究会資料   27   126 - 129   2012.11

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  • Magnet neld sensing beyond the standard quantum limit under the effect of decoherence

    松崎 雄一郎, Benjamin Simon C, Fitzsimons Joseph

    量子情報技術研究会資料   27   93 - 98   2012.11

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  • 20pFB-2 Quantum Zeno effect observed on superconducting qubit

    Kakuyanagi K, Baba T, Matsuzaki Y, Nakano H, Saito S, Semba K

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   641 - 641   2012.8

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  • 18aAK-12 Magnetic field sensing beyond the standard quantum limit under the effect of decoherence

    Matsuzaki Y, Benjamin Simon, Fitzsimons Joe

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   125 - 125   2012.8

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  • 18aAK-11 Quantum Zeno effect in an unstable system with NMR

    Matsuzaki Y, Tanaka H

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   124 - 124   2012.8

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  • 19pAK-14 Entangling homogeneously broadened matter qubits in the weak-coupling cavity-QED regime

    越野 和樹, 松崎 雄一郎

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   155 - 155   2012.8

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  • 19pAK-13 Entangling unstable optically active matter qubits

    Matsuzaki Y, Koshino K, Benjamin Simon, Fitzsimons Joe

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   154 - 154   2012.8

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  • 24aBE-13 Enhanced energy relaxation process of a quantum memory coupled with a superconducting qubit

    Matsuzaki Y, Nakano H

    Meeting abstracts of the Physical Society of Japan   67 ( 1 )   184 - 184   2012.3

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  • 18aAK-11 Quantum Zeno effect in an unstable system with NMR

    Matsuzaki Y, Tanaka H

    Meeting Abstracts of the Physical Society of Japan   67 ( 0 )   2012

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  • 19pAK-14 Entangling homogeneously broadened matter qubits in the weak-coupling cavity-QED regime

    越野 和樹, 松崎 雄一郎

    Meeting Abstracts of the Physical Society of Japan   67 ( 0 )   2012

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  • 24aBE-13 Enhanced energy relaxation process of a quantum memory coupled with a superconducting qubit

    Matsuzaki Y, Nakano H

    Meeting Abstracts of the Physical Society of Japan   67 ( 0 )   2012

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  • 18aAK-12 Magnetic field sensing beyond the standard quantum limit under the effect of decoherence

    Matsuzaki Y, Benjamin Simon, Fitzsimons Joe

    Meeting Abstracts of the Physical Society of Japan   67 ( 0 )   2012

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  • 19pAK-13 Entangling unstable optically active matter qubits

    Matsuzaki Y, Koshino K, Benjamin Simon, Fitzsimons Joe

    Meeting Abstracts of the Physical Society of Japan   67 ( 0 )   2012

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  • 20pFB-2 Quantum Zeno effect observed on superconducting qubit

    Kakuyanagi K, Baba T, Matsuzaki Y, Nakano H, Saito S, Semba K

    Meeting Abstracts of the Physical Society of Japan   67 ( 0 )   2012

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  • 21pED-11 Probabilistic Growth of large entangled states with Low Error Accumulation

    Matsuzaki Yuichiro, Benjamin Simon, Fitzsimons Joe

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   136 - 136   2011.8

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  • 21pED-5 Quantum Zeno effect with a superconducting qubit

    Matsuzaki Y, Saito S, Kakuyanagi K, Semba K

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   135 - 135   2011.8

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  • 21pED-5 Quantum Zeno effect with a superconducting qubit

    Matsuzaki Y, Saito S, Kakuyanagi K, Semba K

    Meeting Abstracts of the Physical Society of Japan   66 ( 0 )   2011

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  • 30aSK-2 Stability of multipartite entanglement against noises

    Matsuzaki Y, Shimizu A

    Meeting abstracts of the Physical Society of Japan   64 ( 1 )   180 - 180   2009.3

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  • 30aSK-2 Stability of multipartite entanglement against noises

    Matsuzaki Y, Shimizu A

    Meeting Abstracts of the Physical Society of Japan   64 ( 0 )   2009

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  • 26aRF-2 Index of superposition of macroscopically distinct states

    Morimae T, Matsuzaki Y, Shimizu A

    Meeting abstracts of the Physical Society of Japan   63 ( 1 )   202 - 202   2008.2

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  • 26aRF-2 Index of superposition of macroscopically distinct states

    Morimae T, Matsuzaki Y, Shimizu A

    Meeting Abstracts of the Physical Society of Japan   63 ( 0 )   2008

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  • 23pRG-9 Appearance of superoosition of macroscopically distinct states in a one-way Quantum computer

    Matsuzaki Y, Shimizu A

    Meeting abstracts of the Physical Society of Japan   62 ( 2 )   189 - 189   2007.8

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  • 23pRG-9 Appearance of superoosition of macroscopically distinct states in a one-way Quantum computer

    Matsuzaki Y, Shimizu A

    Meeting Abstracts of the Physical Society of Japan   62 ( 0 )   2007

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  • 28aSA-4 Stability of quantum macroscopic systems with multi-points correlation

    Matsuzaki Y, Shimizu A

    Meeting abstracts of the Physical Society of Japan   61 ( 1 )   151 - 151   2006.3

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  • 28aSA-4 Stability of quantum macroscopic systems with multi-points correlation

    Matsuzaki Y, Shimizu A

    Meeting Abstracts of the Physical Society of Japan   61 ( 0 )   2006

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Presentations

  • 第6回量子ソフトウェアワークショップ: 最先端の量子技術 ー量子センサーから量子アルゴリズムまでー Invited

    川口英明, 松崎雄一郎

    2025.6 

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  • Theoretical study of the spectroscopic measurements of Kerr non-linear resonators with four-body interaction Invited

    Yuichiro Matsuzaki

    International Network on Quantum Annealing (INQA)  2025.5 

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  • 量子IoT(モノのインターネット)の構築 Invited

    松崎雄一郎

    第19回DPF研究会  2025.5 

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  • Entanglement-enhanced AC magnetometry in the presence of Markovian noises Invited

    yuichiro matsuzaki

    QUPosium2024  2024.12 

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    Language：English   Presentation type：Oral presentation (keynote)  

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  • 量子固体センシングの理論的基礎 Invited

    松崎 雄一郎

    量子計測・センシング基礎講座 第六回  2024.11 

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  • AC magnetic field sensing using continuous-wave optically detected magnetic resonance of nitrogen-vacancy centers in diamond Invited

    QUP Week  2024.8 

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  • 究極の感度を持つ量子センサの実現に向けて Invited

    松崎 雄一郎

    IPSJ-ONE 2024  2024.3 

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  • 中規模量子デバイスを用いた量子秘匿計算 Invited

    松崎 雄一郎

    若手チャレンジラボ「ミニ研究会」  2024.2 

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  • Application of quantum annealing to quantum sensing Invited

    Yuichiro Matsuzaki

    Quantum Innovation 2023  2023.11 

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  • 先端量子センシングデバイス技術 Invited

    松崎雄一郎

    第16回研究会「先端量子デバイスの開拓と展開」  2023.10 

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    Language：Japanese  

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  • 分岐型量子アニーリングによるスピン1粒子間の多体エンタングルメントの生成 Invited

    松崎 雄一郎

    量子アニーリング及び関連技術の基礎から社会実装まで（量子コンピューティング研究拠点主催）  2023.2 

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  • 量子計測の基礎と量子もつれ利用による高感度化への展開(チュートリアル) Invited

    松崎 雄一郎

    応用物理学会  2022.3 

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  • 量子センサの基礎 Invited

    松崎 雄一郎

    センシング先端技術動向 調査報告会 (一般社団法人 電子情報技術産業協会)  2021.7 

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  • Anonymous quantum sensing Invited

    Yuichiro Matsuzaki

    Workshop on Quantum Metrology and connections to quantum networks and quantum cryptography  2021.5 

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  • 固体センサの基礎 Invited

    松崎 雄一郎

    量子計測・センシング基礎講座 第一回 量子固体センシングの基礎(量子ICTフォーラム)  2021.3 

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  • Direct estimation of the energy gap between the ground state and excited state with quantum annealing

    International Conference on Solid State Devices and Materials 2020  2020.9 

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  • Direct estimation of the energy gap between the ground state and excited state with quantum annealing Invited

    Innovations in quantum information technologies  2020.9 

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  • Quantum annealing with spin lock technique Invited

    2020.2 

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  • Quantum annealing with spin lock technique Invited

    Yuichiro Matsuzaki

    2020.1 

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  • 量子ビットを利用した高感度磁気センシングの理論 Invited

    松崎 雄一郎

    理研量子技術イノベーションコアWorkshop  2019.12 

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  • 非対称な情報取得を可能にする量子遠隔センサ Invited

    松崎 雄一郎

    第41回量子情報技術研究会  2019.11 

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  • Quantum remote sensing with asymmetric information gain Invited

    松崎雄一郎

    応用物理学会新領域量子情報研究グループ研究会，東京、NII  2019.10 

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  • Quantum remote sensing with asymmetric information gain Invited

    Canada-Japan Workshop on Hybrid Quantum Systems  2019.6 

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  • Robust Quantum Metrology under the Effect of Dephasing Invited

    International Workshop on Quantum Information, Quantum Computing and Quantum Control  2018.11 

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  • Observation of collective coupling between 4300 superconducting flux qubits and a superconducting resonator Invited International conference

    matsuzaki yuichiro

    Future directions of quantum matter and quantum information research  2018.5 

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  • Magnetic-field sensing with quantum error detection under the effect of energy relaxation Invited International conference

    Yuichiro Matsuzaki

    International Workshop on Quantum Information, Quantum Computing and Quantum Control  2017.12 

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  • Magnetic-field sensing with quantum error detection under the effect of energy relaxation

    Y. Matsuzaki, S. Benjamin

    International Symposium on Hybrid Quantum Systems  2017.9 

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  • Quantum metrology with quantum error detection

    Yuichiro Matsuzaki, Simon Benjamin

    17th Asian Quantum Information Science Conference  2017.9 

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  • エネルギー緩和下における量子誤り検知を用いた磁場センサ

    松崎雄一郎, Simon Benjamin

    日本物理学会  2017.9 

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  • Observation of Collective Coupling between an Engineered Ensemble of Macroscopic Artificial Atoms and a Superconducting Resonator

    Y. Matsuzaki, K. Kakuyanagi, C. Deprez, H. Toida, K. Semba, H. Yamaguchi, W. J. Munro, S. Saito

    Interdisciplinary Workshop on Quantum Device 2017  2017.3 

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  • 未知の共鳴周波数を持った量子ビット集団に対するエネルギー射影測定

    松崎雄一郎, 仲山将順, 添田彬仁, 村尾美緒, 斎藤志郎

    日本物理学会  2017.3 

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  • Improving the coherence time of a quantum system via a coupling with an unstable system

    Y. Matsuzaki, X. Zhu, K. Kakuyanagi, H. Toida, T. Shimo-Oka, N. Mizuochi, K. Nemoto, K. Semba, W. J. Munro, H. Yamaguchi, S. Saito

    International Symposium on Nanoscale Transport and Technology 2015  2015.11 

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  • Hybrid quantum metrology Invited International conference

    matsuzaki yuichiro

    IWQD Camp for Young Researchers  2015.10 

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  • Improving the coherence time of a quantum system via a coupling with an unstable system

    Y. Matsuzaki, X. Zhu, K. Kakuyanagi, H. Toida, T. Shimooka, N. Mizuochi, K. Nemoto, K. Semba, W. J. Munro, H. Yamaguchi, S. Saito

    International Conference on Quantum Cryptography  2015.9 

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  • 超伝導磁束量子ビットとマイクロ波キャビティを用いた超強結合の実現にむけて (理論)

    松崎雄一郎, 角柳孝輔, 石田夏子, 樋田啓, 仙場浩一, 山口浩司, 齊藤志郎

    日本物理学会  2015.9 

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  • Quantum sensing basics Invited International conference

    matsuzaki yuichiro

    Diamond Quantum Sensing Workshop 2015  2015.8 

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  • Improving the coherence time of a quantum system via a coupling with an unstable system

    Y. Matsuzaki, X. Zhu, K. Kakuyanagi, H. Toida, T. Shimooka, N. Mizuochi, K. Nemoto, K. Semba, W. J. Munro, H. Yamaguchi, S. Saito

    American Physical Society March meeting  2015.3 

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  • 不安定系との結合による量子ビットのコヒーレンス時間の改善

    松崎雄一郎, 角柳孝輔, 樋田啓, 下岡孝明, 水落憲和, 根本香絵, 仙場浩一, 山口浩司, 齊藤志郎

    日本物理学会  2015.3 

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  • デコヒーレンス下で標準量子限界を超える量子計測の実装法 Invited

    松崎 雄一郎

    応用物理学会、第七十五回応用物理学会秋季学術講演会  2014.9 

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  • Improving the coherence time of a quantum system via a coupling to a short-lived system

    Y. Matsuzaki, K. Kakuyanagi, H. Toida, T. Shimooka, N. Mizuochi, X. Zhu, K. Nemoto, W. J. Munro, K. Semba, H. Yamaguchi, S. Saito

    14th Asian Quantum Information Science Conference  2014.8 

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  • Vacuum Rabi Oscillation Between a Superconducting Flux Qubit and NV Centers in Diamond: a theoretical analysis

    Y. Matsuzaki, X. Zhu, K. Kakuyanagi, H. Toida, T. Shimooka, N. Mizuochi, K. Nemoto, K. Semba, W. J. Munro, H. Yamaguchi, S. Saito

    Control of Complex Quantum Systems  2014.4 

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  • Observation of dark states in a superconductor diamond quantum hybrid system Invited International conference

    matsuzaki yuichiro

    Interdisciplinary Workshop on Quantum Device 2014  2014.3 

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  • Spin cat 状態を用いた標準量子限界を超えるロバストな磁場計測

    松崎雄一郎, 藤井啓祐, 田中咲, 角柳孝輔, 下岡孝明, 水落憲和, 根本香絵, 仙場浩一, 齊藤志郎

    日本物理学会  2014.3 

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  • Spectroscopy of a hybrid system of a superconducting flux qubit and an electron spin ensemble in diamond: a theoretical analysis

    Y. Matsuzaki, X. Zhu, R. Amsuss, K. Kakuyanagi, T. Shimo-Oka, N. Mizuochi, K. Nemoto, W. J. Munro, K. Semba, S. Saito

    International Symposium on Nanoscale Transport and Technology  2013.11 

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  • A collective dark state in a superconducting flux qubit diamond spin ensemble hybrid system

    Y. Matsuzaki, X. Zhu, R. Amsuss, K. Kakuyanagi, T. Shimo-Oka, N. Mizuochi, K. Nemoto, W. J. Munro, K. Semba, S. Saito

    2013 JSAP-MRS Joint Symposia  2013.9 

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  • ダイヤモンド中の単一 NV 中心における電子スピン及び核スピンを用いた磁場検出器

    松崎雄一郎, 下岡孝明, 田中弘隆, 都倉康弘, 仙場浩一, 水落憲和

    日本物理学会  2013.9 

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  • Hybrid system composed of a superconducting flux qubit and an electron spin ensemble in diamond: A theoretical analysis

    Yuichiro Matsuzaki, Shiro Saito, Xiaobo Zhu, Robert Amsuss, Kosuke Kakuyanagi, Shimooka Takaaki, Norikazu Mizuochi, Kae Nemoto, William J. Munro, Kouichi Semba

    Conference on Lasers and Electro-Optics Pacific Rim, WG1-2, IEEE  2013.6 

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  • Hybrid system composed of a superconducting flux qubit and an electron spin ensemble in diamond

    Y. Matsuzaki, X. Zhu, R. Amsuss, K. Kakuyanagi, T. Shimo-Oka, N. Mizuochi, K. Nemoto, W. J. Munro, K. Semba, S. Saito

    US-Japan Joint Seminar on Quantum Electronics and Laser Spectroscopy  2013.4 

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  • 超伝導磁束量子ビットとダイヤモンド中の電子スピン集団とが結合したハイブリッド系の理論解析

    松崎雄一郎, 齋藤 志郎, Zhu Xiaobo, Amsuss Robert, 下岡 孝明, 水落 憲和, 根本 香絵, W. J. Munro, 仙場 浩一

    日本物理学会  2013.3 

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  • デコヒーレンス下で標準量子限界を超える磁場センサー

    松崎雄一郎, S Benjamin, J Fitzsimons

    量子情報技術研究会  2012.11 

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  • 光子検出器の精度に依存しない 分散型量子計算機

    松崎雄一郎, S Benjamin, J Fitzsimons

    量子情報技術研究会  2012.11 

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  • NMR を用いた不安定系に対する量子ゼノン効果

    松崎雄一郎, 田中弘隆

    日本物理学会  2012.9 

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  • 不安定な固体量子ビット間のエンタングルメント生成

    松崎雄一郎, 越野和樹, S. Benjamin, J. Fitzsimons

    日本物理学会  2012.9 

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  • デコヒーレンス下で標準量子限界を超える磁場センサー

    松崎雄一郎, S Benjamin, J Fitzsimons

    日本物理学会  2012.9 

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  • 量子メモリーと超伝導量子ビットの結合系における増幅されたエネルギー緩和過程

    松崎雄一郎, 中ノ勇人

    日本物理学会  2012.3 

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  • Probabilistic Growth of large entangled states with Low Error Accumulation

    松崎雄一郎, S Benjamin, J Fitzsimons

    日本物理学会  2011.9 

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  • 超伝導量子ビットを用いた量子ゼノン効果

    松崎雄一郎, 齊藤志郎, 角柳孝輔, 仙場浩一

    日本物理学会  2011.9 

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  • 多体エンタングルメントのノイズに対する安定性

    松崎雄一郎, 清水明

    日本物理学会  2009.9 

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  • 一方向量子計算機におけるマクロに 異なる状態の重ね合わせの出現

    松崎雄一郎, 清水明

    日本物理学会  2007.9 

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  • 多地点相関をもつ マクロ量子系の安定性

    松崎雄一郎, 清水明

    日本物理学会  2006.3 

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Awards

  • 所長表彰 業績賞

    2021.3   NTT物性科学基礎研究所   超伝導量子ビットを用いた極限量子センシングの研究

    樋田 啓、Leonid Abdurakhimov、松崎 雄一郎、角柳 孝輔、 Imran Mahboob、酒井 洸児、手島 哲彦、齊藤 志郎

  • 先端総研所長表彰 研究開発賞

    2017.12   NTT   量子力学の原理を実証する超伝導回路の研究

    角柳孝輔, 松崎雄一郎, 樋田 啓, W. J. Munro, 齊藤志郎

  • 所長表彰 業績賞

    2017.3   物性科学基礎研究所   "超伝導回路を用いた量子力学における原理実証実験の推進"

    角柳孝輔, G. C. Knee, 松崎雄一郎, 樋田 啓, W. J. Munro, 齊藤志郎

  • 日本物理学会若手奨励賞

    2017.3   日本物理学会   Robust Magnetic Field Sensing Beyond the Standard Quantum Limit

    松崎 雄一郎

  • 物性科学基礎研究所 所長表彰 奨励賞

    2016.3   NTT物性科学基礎研究所   "超伝導ハイブリッド量子系に関する理論研究の推進"

    松崎 雄一郎

Research Projects

  • 生命現象解明のための高感度量子センシング顕微鏡開発研究

    Grant number：JPMJCR23I5  2023.10 - 2029.3

    科学技術振興機構(JST)  CREST 

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    Authorship：Coinvestigator(s) 

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  • クラウド量子デバイスを用いた多体量子もつれの評価とその応用

    2024 - 2027

    科学技術振興機構  戦略的な研究開発の推進 戦略的創造研究推進事業 さきがけ  中央大学

    松崎 雄一郎

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    Authorship：Principal investigator 

    D-wave社およびQuEra社クラウドの実機を用いて多体の量子もつれ状態を生成して、その寿命を計測する。そして、古典計算機によるシミュレーションにより実験結果を再現して、多体の量子もつれ状態と環境との相互作用を理解する。その後、クラウドの実機を用いて、多体の量子もつれ状態を利用した新しい量子アルゴリズムの実証と、古典限界を超える量子センサの実証を行う。

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    J-GLOBAL

  • ゲートとアニーリングの複合方式による中規模量子コンピュータ向けアルゴリズムの開発

    Grant number：23H04390  2023.4 - 2025.3

    日本学術振興会  科学研究費助成事業  学術変革領域研究(A)（公募研究）  中央大学

    松崎 雄一郎

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    Grant amount： \5200000 （ Direct Cost: \4000000 、 Indirect Cost： \1200000 ）

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  • Universal quantum media conversion in diamond quantum storage

    Grant number：20H05661  2020.8 - 2025.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)  Grant-in-Aid for Scientific Research (S)  Yokohama National University

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    Authorship：Coinvestigator(s) 

    Grant amount： \196040000 （ Direct Cost: \150800000 、 Indirect Cost： \45240000 ）

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  • スケーラブルで強靭な統合的量子通信システム

    2022 - 2025

    科学技術振興機構  戦略的な研究開発の推進 ムーンショット型研究開発事業  慶應義塾大学

    永山 翔太

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    本プロジェクトでは、分散型大規模量子コンピュータの主要技術である汎用量子通信ネットワークのテストベッドを構築し、実運用を見据えた通信アーキテクチャやプロトコル等の原理・技術実証にハードウェア・ソフトウェアを統合して取り組みます。本プロジェクトの成果は分散型大規模量子コンピュータのみならず量子インターネットにも繋がり、両者を両輪とする、量子情報を自在に生成・流通・分散処理する世界の実現に貢献します。

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    J-GLOBAL

  • 完全秘匿性を実現する量子 IoT アーキテクチャの構築

    2019.10 - 2023.3

    科学技術振興機構(JST)  さきがけ 

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    Authorship：Principal investigator 

    Grant amount： \33000000

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  • 革新的量子情報処理システムの創出

    2018.4 - 2020.3

    文部科学省  卓越研究員事業 

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    Authorship：Principal investigator 

    Grant amount： \22000000

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  • ハイブリッド量子科学の理論的研究

    Grant number：15H05870  2015.6 - 2020.3

    日本学術振興会  科学研究費助成事業 新学術領域研究(研究領域提案型)  新学術領域研究(研究領域提案型)  国立情報学研究所

    根本 香絵, 江藤 幹雄, 松崎 雄一郎, 森 伸也

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    Grant amount： \144040000 （ Direct Cost: \110800000 、 Indirect Cost： \33240000 ）

    ハイブリッド量子科学の基礎創成に向けて、理論の枠組みの構築と、ハイブリッド量子現象と応用の理論提案に取り組んだ。まず、ユニバーサルな量子共同現象の理論的枠組みの確立と、異なるハイブリッド系で示す多様な現象を明らかにした。また、ハイブリッド量子系の概念を拡張し、現象やプロトコルなどのハイブリッド化により新しい物理現象や応用の可能性を示した。量子計測では、量子センサを有するサーバーと、量子センサは持たないが高感度計測を行いたい顧客の二者がいる状況を考えて、顧客が情報漏洩の心配なくサーバーの量子センサにより情報を得るプロトコルを提案した。さらに一方向性の量子状態転送に着目し、初期状態を用意した後に状態が初期サイトから目標サイトまで自動的に転送されるプロトコルを提案した。
    電子・フォトンのハイブリッド量子系では、量子ドットにTHz光を照射したときの光電流を考察した。まず単一量子ドットにおける光電流の表式を理論的に導き、平川グループ（フォノン班）の実験結果を説明した。次に、複数の量子ドットの並列系における光電流を定式化し、量子ドット間のエンタングルメント生成による光電流の増大機構を提案した。他に、カーボンナノチューブにおけるトポロジカル物性の研究成果を論文にまとめ、また電子・フォノンのハイブリッド系としての性質として、フランク・コンドン効果の輸送特性への影響を調べた。
    非平衡グリーン関数法に基づくフォノン輸送シミュレータを用いて、グラフェンナノリボンの熱コンダクタンスを計算した。線形分散を示す面内モードと２次の分散を示す面外モード・フォノンによる熱コンダクタンスのナノリボン長依存性を調べた。その結果、面内モードの熱コンダクタンスは、リボン長の平方根に反比例する異常拡散性を示すのに対して、面外モードでは、通常の拡散に近いリボン長依存性を示すことを見いだした。

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  • Hybrid quantum metrology

    Grant number：15K17732  2015.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)  Grant-in-Aid for Young Scientists (B)  NTT Basic Research Laboratories

    Matsuzaki Yuichiro

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    Grant amount： \4160000 （ Direct Cost: \3200000 、 Indirect Cost： \960000 ）

    We have investigated how hybrid quantum systems can enhance the sensitivity of the quantum sensors. We have studied the role of quantum entanglement to beat the standard quantum limit that every classical sensors are bounded by. Especially, we have discussed the use of superconducting circuits, electron spin, and nuclear spins to improve the sensitivity of the hybrid sensors. We have collaborated with experimentalists, and discuss how our theoretical ideas can be demonstrated in the current technology. Moreover, some of our ideas have been tested by the actual experiments. Our results contributes not only the realization of the sensors but also a milestone for the more advanced quantum applications such as quantum computation, quantum repeater, and quantum simulation. Therefore, we believe that our results are significantly important in this quantum information society.

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Academic Activities

  • International Conference on Solid State Devices and Materials Committees

    Role(s)： Planning, management, etc.

    International Conference on Solid State Devices and Materials Committees  2021.4 - Now

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  • 量子計測・センシング技術推進委員会幹事

    Role(s)： Planning, management, etc.

    量子ICTフォーラム  2019.11 - Now

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  • 量子ソフトウェア研究会

    Role(s)： Planning, management, etc.

    情報処理学会  2019.10 - Now

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    Type：Academic society, research group, etc. 

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