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


Related Research Fields


Research Subjects

  • Superconducting qubit
  • Quantum simulation
  • Quantum dynamics

Selected Publications

  1. K. Inomata, K. Koshino, Z. R. Lin, W. D. Oliver, J. S. Tsai, Y. Nakamura, and T. Yamamoto:
    "Microwave Down-Conversion with an Impedance-Matched Λ System in Driven Circuit QED"
    Phys. Rev. Lett. 113, 063604 (2014), Editor’s Choice
  2. Z.R. Lin, K. Inomata, K. Koshino, W.D. Oliver, Y. Nakamura, J.S. Tsai1, & T. Yamamoto:
    "Josephson parametric phase-locked oscillator and its application to dispersive readout of superconducting qubits"
    Nature Communications, Volume: 5, Article number: 4480, doi:10.1038/ncomms5480
  3. O. V. Astafiev, L. B. Ioffe, S. Kafanov, Yu. A. Pashkin, K. Yu. Arutyunov, D. Shahar, O. Cohen, & J. S. Tsai:
    "Coherent quantum phase slip"
    Nature, doi:10.1038/nature10930, 2012
  4. J. Bylander, J. Gustavsson, F. Yan, F. Yoshihara, K. Harrabi, G. Fitch, D. G. Cory, Y. Nakamura, J.-S. Tsai, and W. D. Oliver:
    "Noise spectroscopy through dynamical decoupling with a superconducting flux qubit"
    Nature Physics, doi:10.1038/nphys1994, 2011
  5. A.A. Abdumalikov, Jr., O. Astafiev, A. M. Zagoskin, Yu. A. Pashkin, Y. Nakamura & J. S. Tsai:
    "Electromagnetically Induced Transparency on a Single Artificial Atom"
    Physical Review Letters, 104, 193601, 2010
  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 & 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

Zhihui Peng
Research Scientist
Simon Devitt
Research Scientist

Contact information

S403, Bioscience Building, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan

Email: tsai [at]