Press Release

Publications in 2022

1. L. V. Abdurakhimov, I. Mahboob, H. Toida, K. Kakuyanagi, Y. Matsuzaki, and S. Saito

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

   PRX Quantum 3 (4), 040332 (2022).

2. I. Mahboob, H. Toida, K. Kakuyanagi, Y. Nakamura, and S. Saito

   A three-dimensional Josephson parametric amplifier

   Appl. Phys. Express 15 (6), 062005 (2022).

Publications in 2021

Publications in 2020

1. J. O'Sullivan, O. W. Kennedy, C. W. Zollitsch, M. Simenas, C. N. Thomas, L. V. Abdurakhimov, S. Withington, and J. J. Morton

   Spin-Resonance Linewidths of Bismuth Donors in Silicon Coupled to Planar Microresonators

   Phys. Rev. Appl. 14 (6), 064050 (2020).

2. L. V. Abdurakhimov, I. Mahboob, H. Toida, K. Kakuyanagi, Y. Matsuzaki, and S. Saito

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

   Phys. Rev. B 102 (10), 100502 (2020).

3. H. Toida, T. Ohrai, Y. Matsuzaki, K. Kakuyanagi, and S. Saito

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

   Phys. Rev. B 102 (9), 094502 (2020).

4. I. Iakoupov, Y. Matsuzaki, W. J. Munro, and S. Saito

   Sequential nonabsorbing microwave single-photon detector

   Phys. Rev. Res. 2 (3), 033238 (2020).

5. R. P. Budoyo, K. Kakuyanagi, H. Toida, Y. Matsuzaki, and S. Saito

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

   Appl. Phys. Lett. 116 (19), 194001 (2020).

6. Y. Matsuzaki, V. M. Bastidas, Y. Takeuchi, W. J. Munro, and S. Saito

   One-way Transfer of Quantum States via Decoherence

   J. Phys. Soc. Jpn. 89 (4), 044003 (2020).

7. K. Miyanishi, Y. Matsuzaki, H. Toida, K. Kakuyanagi, M. Negoro, M. Kitagawa, and S. Saito

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

   Phys. Rev. A 101 (5), 052303 (2020).

8. S. Endo, Y. Matsuzaki, K. Kakuyanagi, S. Saito, N. Lambert, and F. Nori

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

   Sci Rep 10 (1), 1751 (2020).

Publications in 2019

1. L. V. Abdurakhimov, I. Mahboob, H. Toida, K. Kakuyanagi, and S. Saito

   A long-lived capacitively shunted flux qubit embedded in a 3D cavity

   ppl. Phys. Lett. 115 (26), 262601 (2019).

2. T. Yamaguchi, Y. Matsuzaki, S. Saito, S. Saijo, H. Watanabe, N. Mizuochi, and J. Ishi-Hayase

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

   Jpn. J. Appl. Phys. 58 (10), 100901 (2019).

3. M. Tatsuta, Y. Matsuzaki, and A. Shimizu

   Quantum metrology with generalized cat states

   Phys. Rev. A 100 (3), 032318 (2019).

4. L. B. Ho, Y. Matsuzaki, M. Matsuzaki, and Y. Kondo

   Realization of controllable open system with NMR

   New J. Phys. 21, 093008 (2019).

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

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

   Phys. Rev. A 99 (6), 063822 (2019).

6. L. V. Abdurakhimov, S. Khan, N. A. Panjwani, D. Breeze, M. Mochizuki, S. Seki, Y. Tokura, J. J. Morton, and H. Kurebayashi

   Magnon-photon coupling in the noncollinear magnetic insulator Cu2OSeO3

   Phys. Rev. B 99 (14), 140401 (2019).

7. H. Toida, Y. Matsuzaki, K. Kakuyanagi, X. B. Zhu, W. J. Munro, H. Yamaguchi, and S. Saito

   Electron paramagnetic resonance spectroscopy using a single artificial atom

   Commun. Phys. 2, 33 (2019).

8. Y. Takeuchi, Y. Matsuzaki, K. Miyanishi, T. Sugiyama, and W. J. Munro

   Quantum remote sensing with asymmetric information gain

   Phys. Rev. A 99 (2), 022325 (2019).

9. P. Renault, H. Yamaguchi, and I. Mahboob

   Virtual Exceptional Points in an Electromechanical System

   Phys. Rev. Appl. 11 (2), 024007 (2019).

10. K. Yahata, Y. Matsuzaki, S. Saito, H. Watanabe, and J. Ishi-Hayase

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

    Appl. Phys. Lett. 114 (2), 022404 (2019).

Publications in 2018

1. Y. Matsuzaki, S. Benjamin, S. Nakayama, S. Saito, and W. J. Munro

   Quantum Metrology beyond the Classical Limit under the Effect of Dephasing

   Phys. Rev. Lett. 120 (14), 140501 (2018).

2. R. P. Budoyo, K. Kakuyanagi, H. Toida, Y. Matsuzaki, W. J. Munro, H. Yamaguchi, and S. Saito

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

   Appl. Phys. Express 11 (4), 043002 (2018).

3. K. Hayashi, Y. Matsuzaki, T. Taniguchi, T. Shimo-Oka, I. Nakamura, S. Onoda, T. Ohshima, H. Morishita, M. Fujiwara, S. Saito, and N. Mizuochi

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

   Phys. Rev. Appl. 10 (3), 034009 (2018).

4. S. Saijo, Y. Matsuzaki, S. Saito, T. Yamaguchi, I. Hanano, H. Watanabe, N. Mizuochi, and J. Ishi-Hayase

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

   Appl. Phys. Lett. 113 (8), 082405 (2018).

5. F. Yoshihara, T. Fuse, Z. Ao, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Koshino, and K. Semba

   Inversion of Qubit Energy Levels in Qubit-Oscillator Circuits in the Deep-Strong-Coupling Regime

   Phys. Rev. Lett. 120 (18), 183601 (2018).

6. Y. Matsuzaki, S. Benjamin, S. Nakayama, S. Saito, and W. J. Munro

   Quantum Metrology beyond the Classical Limit under the Effect of Dephasing

   Phys. Rev. Lett. 120 (14), 140501 (2018).

7. R. P. Budoyo, K. Kakuyanagi, H. Toida, Y. Matsuzaki, W. J. Munro, H. Yamaguchi, and S. Saito

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

   Appl. Phys. Express 11 (4), 043002 (2018).

8. R. P. Budoyo, K. Kakuyanagi, H. Toida, Y. Matsuzaki, W. J. Munro, H. Yamaguchi, and S. Saito

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

   Phys. Rev. Mater. 2 (1), 011403 (2018).

Publications in 2017

1. S. Kitazawa, Y. Matsuzaki, S. Saijo, K. Kakuyanagi, S. Saito, and J. Ishi-Hayase

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

   Phys. Rev. A 96 (4), 042115 (2017).

2. A. Iwakura, Y. Matsuzaki, and Y. Kondo

   Engineered noisy environment for studying decoherence

   Phys. Rev. A 96 (3), 032303 (2017).

3. Y. Matsuzaki, S. Nakayama, A. Soeda, S. Saito, and M. Murao

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

   Phys. Rev. A 95 (6), 062106 (2017).

4. F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, and K. Semba

   Characteristic spectra of circuit quantum electrodynamics systems from the ultrastrong- to the deep-strong-coupling regime

   Phys. Rev. A 95 (5), 053824 (2017).

5. F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, and K. Semba

   Characteristic spectra of circuit quantum electrodynamics systems from the ultrastrong- to the deep-strong-coupling regime

   Phys. Rev. A 95 (5), 053824 (2017).

6. Y. Matsuzaki, and S. Benjamin

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

   Phys. Rev. A 95 (3), 032303 (2017).

7. F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, and K. Semba

   Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime

   Nat. Phys. 13 (1) 44-47 (2017).

Publications in 2016

1. Y. Matsuzaki, T. Shimo-Oka, H. Tanaka, Y. Tokura, K. Semba and N. Mizuochi

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

   Phys. Rev. A 94 (5), 052330 (2016)

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

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

   Phys. Rev. Lett. 117 (21), 210503 (2016)

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

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

   J. Phys. Soc. Jpn. 85 (10), 104801 (2016)

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

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

   J. Phys.-Condes. Matter 28 (27), 275302 (2016)

5. S. Dooley, E. Yukawa, Y. Matsuzaki, G. C. Knee, W. J. Munro and K. Nemoto

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

   New J. Phys. 18 (2016)

6. H. Toida, Y. Matsuzaki, K. Kakuyanagi, X. B. Zhu, W. J. Munro, K. Nemoto, H. Yamaguchi and S. Saito

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

   Appl. Phys. Lett. 108 (5), 052601 (2016)

7. Y. Matsuzaki and H. Tanaka

   Quantum Zeno Effect in an Unstable System with NMR

   J. Phys. Soc. Jpn. 85 (1), 014001 (2016)

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

   Using the quantum Zeno effect for suppression of decoherence

   New J. Phys. 18 013033 (2016)

9. G. C. Knee, K. Kakuyanagi, M. C. Yeh, Y. Matsuzaki, H. Toida, H. Yamaguchi, S. Saito, A. J. Leggett, and W. J. Munro

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

   Nat. Commun. 7, 13253 (2016).

10. N. Lambert, Y. Matsuzaki, K. Kakuyanagi, N. Ishida, S. Saito, and F. Nori

    Superradiance with an ensemble of superconducting flux qubits

    Phys. Rev. B 94 (22), 224510 (2016)

Publications in 2015

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

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

   Phys. Rev. Lett. 115, 170801 (2015)

2. S. Endo, Y. Matsuzaki, W. J. Munro, T. Koike and S. Saito

   Spin Amplification in an Inhomogeneous System

   J. Phys. Soc. Jpn. 84, 103001 (2015)

3. J. Govenius, Y. Matsuzaki, I. G. Savenko and M. Mottonen

   Parity measurement of remote qubits using dispersive coupling and photodetection

   Phys. Rev. A 92, 042305 (2015)

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

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

   J. Phys.-Condes. Matter 27, 345702 (2015)

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

   Observation of quantum Zeno effect in a superconducting flux qubit

   New J. Phys. 17, 063035 (2015)

6. T. Satoh, Y. Matsuzaki, K. Kakuyanagi, W. J. Munro, K. Semba, H. Yamaguchi and S. Saito

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

   Phys. Rev. A 91, 052329 (2015)

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

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

   Phys. Rev. A 91, 042329 (2015)

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

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

   Phys. Rev. Lett. 114, 120501 (2015)

Publications in 2014

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

   Observation of dark states in a superconductor diamond quantum hybrid system

   Nat. Commun. 5, 3524 (2014)

Publications in 2013

1. K. Kakuyanagi, S. Kagei, R. Koibuchi, S. Saito, A. Lupascu, K. Semba, and H. Nakano

   Experimental analysis of the measurement strength dependence of superconducting qubit readout using a Josephson bifurcation readout method

   New J. Phys. 15, 043028 (2013)

2. S. Saito, XB. Zhu, R. Amsuess, Y. Matsuzaki, K. Kakuyanagi, T. Shimo-Oka, N. Mizuochi, K. Nemoto, WJ. Munro, and K. Semba

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

   Phys. Rev. Lett. 111 (10), 107008 (2013)

3. A. Shimizu, Y. Matsuzaki, and A. Ukena

   Necessity of Superposition of Macroscopically Distinct States for Quantum Computational Speedup

   J. Phys. Soc. Jpn. 82 (5), 054801 (2013)

Publications in 2012

1. K. Koshino, and Y. Matsuzaki.

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

   Physical Review A 86 (2), 020305 (2012)

2. Y. Matsuzaki, and H. Nakano

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

   Physical Review B 86 (18), 184501 (2012)