Centers & Labs

RIKEN Center for Emergent Matter Science

Superconducting Quantum Simulation Research Team

Team Leader: Jaw-Shen Tsai (Ph.D.)
Jaw-Shen  Tsai(Ph.D.)

Superconducting qubit possesses high degree of freedoms in the circuit design and ability to local control as well as readout quantum states. Utilizing these properties, the development of small scale quantum analog simulator that aiming for the simulations of macroscopic material properties is targeted. Study of non-equilibrium quantum dynamics in these circuits is also planned.

Main Research Field

Interdisciplinary science and engineering

Related Research Fields



  • Superconductivity
  • Josephson effect
  • Macroscopic quantum coherence
  • Superconducting qubit
  • Superconducting quantum information processing

Selected Publications

  1. Z.H. Peng, S.E. de Graaf, J.S. Tsai, and O.V. Astafiev:
    "Tuneable on-demand single-photon source in the microwave range"
    Nature Communications, 7, 12588 (2016)
  2. K. Inomata, Z.R Lin, K. Koshino, W.D. Oliver, J.S. Tsai, T. Yamamoto, and Y. Nakamura:
    "Single microwave-photon detector using an artificial Λ-type three-level system"
    Nature Communications, 7, 12303 (2016)
  3. Z.H. Peng, Yu-xi Liu, J.T. Peltonen, T. Yamamoto, J.S. Tsai, and O. Astafiev:
    "Correlated Emission Lasing in Harmonic Oscillators Coupled via a Single Three-Level Artificial Atom"
    Physical Review Letters, 115, 223603 (2015)
  4. Z.R. Lin, K. Inomata, K. Koshino, W.D. Oliver, Y. Nakamura, J.S. Tsai, and T. Yamamoto:
    "Josephson parametric phase-locked oscillator and its application to dispersive readout of superconducting qubits"
    Nature Communications, 5, 4480 (2014)
  5. O.V. Astafiev, L.B. Ioffe, S. Kafanov, Yu. A. Pashkin, K.Yu. Arutyunov, D. Shahar, O. Cohen, and J.S. Tsai:
    "Coherent quantum phase slip"
    Nature, 484, 355, 10930 (2012)
  6. O. Astafiev, A.M. Zagoskin, A.A. Abdumalikov Jr., Yu.A. Pashkin, T. Yamamoto, K. Inomata, Y. Nakamura, and J.S. Tsai:
    "Resonance Fluorescence of a Single Artificial Atom"
    Science, 327, 840 (2010)
  7. O. Astafiev, K. Inomata, A.O. Niskanen, T. Yamamoto, Yu.A. Pashkin, Y. Nakamura, and J.S. Tsai:
    "Single artificial-atom lasing"
    Nature, 449, 588 (2007)
  8. A.O. Niskanen, K. Harrabi, F. Yoshihara, Y. Nakamura, S. Lloyd, and J.S. Tsai:
    "Quantum Coherent Tunable Coupling of Superconducting Qubits"
    Science, 316, 723 (2007)
  9. T. Yamamoto, Yu. Y. Pashkin, O. Astafiev, Y. Nakamura, and J. S. Tsai:
    "Demonstration of conditional gate operation using superconducting charge qubits"
    Nature, 425, 941 (2003)
  10. Yu.A. Pashkin, T. Yamamoto, O. Astafiev, Y. Nakamura, D.V. Averin, and J.S. Tsai:
    "Quantum oscillations in two coupled charge qubits"
    Nature, 421, 823 (2003)

Lab Members

Principal Investigator

Jaw-Shen Tsai
Team Leader

Core Members

Fumiki Yoshihara
Visiting Scientist
Zhihui Peng
Visiting Scientist
Joonas Tapio Peltonen
Visiting Scientist
Simon Devitt
Visiting Scientist

Contact information

S407, Bioscience Building, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Tel: +81-(0)48-467-4090
Fax: +81-(0)48-462-4622

Email: tsai [at]