超伝導量子回路をベースに、超伝導、エレクトロニクス、フォトニクスが融合した巨視的世界での新しい量子分野を開拓します。
Toida, K. Sakai, T. F. Teshima, M. Hori, K. Kakuyanagi, I. Mahboob, Y. Ono, and S. Saito, "Magnetometry of neurons using a superconducting qubit", Commun. Phys. 6, 19 (2023).
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, 040332 (2022).
L. V. Abdurakhimov, I. Mahboob, H. Toida, K. Kakuyanagi, and S. Saito, "A long-lived capacitively shunted flux qubit embedded in a 3D cavity", Appl. Phys. Lett. 115, 262601 (2019).
H. Toida, Y. Matsuzaki, K. Kakuyanagi, X. Zhu, W. J. Munro, H. Yamaguchi, and S. Saito, "Electron paramagnetic resonance spectroscopy using a single artificial atom", Commun. Phys. 2, 33 (2019).
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, 44 (2017).
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, 210503 (2016).
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).
H. Toida, Y. Matsuzaki, K. Kakuyanagi, X. 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, 052601 (2016).
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).
X. 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, 3424 (2014).
S. Saito, X. Zhu, R. Amsuss, Y. Matsuzaki, K. Kakuyanagi, T. Shimo-Oka, N. Mizuochi, K. Nemoto, W. J. Munro and K. Semba, "Towards Realizing a Quantum Memory for a Superconducting Qubit: Storage and Retrieval of quantum states", Phys. Rev. Lett. 111, 107008 (2013).
X. Zhu, S. Saito, A. Kemp, K. Kakuyanagi, S. Karimoto, H. Nakano, W. J. Munro, Y. Tokura, M. S. Everitt, K. Nemoto, M. Kasu, N. Mizuochi and K. Semba, "Coherent coupling of a superconducting flux qubit to an electron spin ensemble in diamond", Nature 478, 221 (2011).
X. Zhu, A. Kemp, S. Saito, and K. Semba, "Coherent operation of a gap-tunable flux qubit", Appl. Phys. Lett. 97, 102503 (2010).
F. Deppe, M. Mariantoni, E. P. Menzel, A. Marx, S. Saito, K. Kakuyanagi, H. Tanaka, T. Meno, K. Semba, H. Takayanagi, E. Solano, and R. Gross, "Two-photon probe of the Jaynes-Cummings model and controlled symmetry breaking in circuit QED", Nat. Phys. 4, 686 (2008).
A. Lupascu, S. Saito, T. Picot, P. C. de Groot, C. J. P. M. Harmans, and J. E. Mooij, "Quantum non-demolition measurement of a superconducting two-level system", Nat. Phys. 3, 119 (2007).
K. Kakuyanagi, T. Meno, S. Saito, H. Nakano, K. Semba, H. Takayanagi, F. Deppe, and A. Shnirman, "Dephasing of a superconducting flux qubit", Phys. Rev. Lett. 98, 047004 (2007).
J. Johansson, S. Saito, T. Meno, H. Nakano, M. Ueda, K. Semba, and H. Takayanagi, ""Vacuum Rabi oscillations in a macroscopic superconducting qubit LC oscillator system", Phys. Rev. Lett. 96, 127006 (2006).
S. Saito, T. Meno, M. Ueda, H. Tanaka, K. Semba, and H. Takayanagi, "Parametric control of a superconducting flux qubit", Phys. Rev. Lett. 96, 107001 (2006).
S. Saito, M. Thorwart, H. Tanaka, M. Ueda, H. Nakano, K. Semba, and H. Takayanagi, "Multiphoton transitions in a macroscopic quantum two-state system", Phys. Rev. Lett. 93, 037001 (2004).