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RIKEN Center for Quantum Computing Optical Quantum Computing Research Team

Team Leader: Akira Furusawa (Ph.D.)

Research Summary

 Akira Furusawa (Ph.D.)

Our final goal is the realization of fault-tolerant large-scale universal optical quantum computers with our original deterministic quantum teleportation methodology. The heart of this methodology is cluster states of optical modes, which are special multipartite entangled states and correspond to “quantum look-up tables for quantum computation”. We will pursue the size and precision of the cluster states with our original time-domain multiplexing methodology.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Engineering
  • Informatics
  • Complex Systems
  • Interdisciplinary Science & Engineering
  • Atomic/Molecular/Quantum electronics


  • Quantum Information Science
  • Quantum Optics

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.

  • 1. *Furusawa, A., Sorensen, J. L., Braunstein, S. L., Fuchs, C. A., Kimble, H. J., and Polzik, E. S.:
    "Unconditional quantum teleportation"
    Science 282, 706 (1998).
  • 2. *Yonezawa, H., Aoki, T., and Furusawa, A.:
    "Demonstration of a quantum teleportation network for continuous variables"
    Nature 431, 430 (2004).
  • 3. *Lee, N., Benichi, H., Takeno, Y., Takeda, S., Webb, J., Huntington, E., and Furusawa, A.:
    "Teleportation of non-classical wave-packets of light"
    Science 332, 330 (2011).
  • 4. *Yonezawa, H., Nakane, D., Wheatly, T. A., Iwasawa, K., Takeda, S., Arao, H., Ohki, K., Tsumura, K., Berry, D. W., Ralph, T. C., Wiseman, H. M., Huntington, E. H., and Furusawa, A.:
    "Quantum-enhanced optical-phase tracking"
    Science 337, 1514 (2012).
  • 5. *Takeda, S., Mizuta, T., Fuwa, M., van Loock, P., and Furusawa, A.:
    "Deterministic quantum teleportation of photonic quantum bits by a hybrid technique"
    Nature 500, 315 (2013).
  • 6. *Asavanant, W., Shiozawa, Y., Yokoyama, S., Charoensombutamon, B., Emura, H., Alexander, R. N., Takeda, S., Menicucci, N. C., Yonezawa, H., and Furusawa, A.:
    "Generation of time-domain-multiplexed two-dimensional cluster state"
    Science 366, 373 (2019).
  • 7. Fukui, K., Endo, M., Asavanant, W., Sakaguchi, A., Yoshikawa, J., and Furusawa, A.:
    "Generating Gottesman-Kitaev-Preskill qubit using a cross-Kerrinteraction between a squeezed light and Fock states in optics"
    Phys. Rev. A 105, 022436 (2022)
  • 8. Sonoyama, T., Asavanant, W., Fukui, K., Endo, M., Yoshikawa, J., and Furusawa, A.:
    "Analysis of optical quantum state preparation using photon detectors in the finite-temporal-resolution regime"
    Phys. Rev. A 105, 043714 (2022)
  • 9. Takase, K., Kawasaki, A., Jeong, B. K., Endo, M., Kashiwazaki, T., Kazama, T., Enbutsu, K., Watanabe, K., Umeki, T., Miki, S., Terai, H., Yabuno, M., China, F., Asavanant, W., Yoshikawa, J., and Furusawa, A.:
    "Generation of Schrödinger cat states with Wigner negativity using continuous-wave low-loss waveguide optical parametric amplifier"
    Optics Express 30, 14161-14171 (2022)
  • 10. Fukui, K., Takeda, S., Endo, M., Asavanant, W., Yoshikawa, J., van Loock, P., and Furusawa, A.:
    "Efficient backcasting search for optical quantum state synthesis"
    Phys. Rev. Lett. 128, 240503 (2022)

Lab Members

Principal investigator

Akira Furusawa
Team Leader

Core members

Jun-ichi Yoshikawa
Research Scientist
Atsushi Sakaguchi
Postdoctoral Researcher

Contact Information

2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Email: akira.furusawa [at] riken.jp