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RIKEN Center for Quantum Computing Superconducting Quantum Computing System Research Unit

Unit Leader: Yutaka Tabuchi (Ph.D.)

Research Summary

Yutaka Tabuchi (Ph.D.)

Our unit pursues the realization of practical quantum computers. We study a quantum mechanical system that integrates qubits, readout circuits, wiring, control electronics, cooling units, signal processing circuits, etc, to exploit and maximize a quantum mechanical feature in superconducting quantum chips. Each component has strengths and weaknesses, and the combination of those give trade-offs. We aim to establish a design method that harmonizes the elements to expand the performance and scalability of a quantum computing system.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Engineering
  • Informatics
  • Interdisciplinary Science & Engineering
  • Atomic/Molecular/Quantum Electronics
  • Nanostructural physics
  • Electron device/Electronic equipment


  • Quantum computer
  • Superconducting electronics
  • Microwave Engineering
  • Quantum Technology

Selected Publications

  • 1. D. Lachance-Quirion, S. Wolski, Y. Tabuchi, S. Kono, K. Usami, Y. Nakamura.:
    "Entanglement-based single-shot detection of a single magnon with a superconducting qubit"
    Science 367, pp.425-428 (2020)
  • 2. Y. Tabuchi, S. Tamate, Y. Nakamura.:
    "Toward scalable superconducting quantum computer implementation"
    IEICE Transactions on Electronics E102-C, pp.212-216 (2019)
  • 3. Y. Masuyama, K. Funo, Y. Murashita, A. Noguchi, S. Kono, Y. Tabuchi, R. Yamazaki, M. Ueda, Y. Nakamura.:
    "Information-to-work conversion by Maxwell's demon in a superconducting circuit quantum electrodynamical system"
    Nature Communications 9, p.1291 (2018)
  • 4. S. Kono, K. Koshino, Y. Tabuchi, A. Noguchi, Y. Nakamura.:
    "Quantum non-demolition detection of an itinerant microwave photon"
    Nature Physics 14, pp.546-549 (2018)
  • 5. Y. Tabuchi, M. Negoro, M. Kitagawa.:
    "Design method of dynamical decoupling sequences integrated with optimal control theory"
    Physical Review A 96, p.022331 (2017)
  • 6. D. Lachance-Quirion, Y. Tabuchi, S. Ishino, A. Noguchi, T. Ishikawa, R. Yamazaki, Y. Nakamura.:
    "Resolving quanta of collective spin excitations in a millimeter-sized ferromagnet"
    Science Advances 3, e1603150 (2017)
  • 7. R. Hisatomi, A. Osada, Y. Tabuchi, T. Ishikawa, A. Noguchi, R. Yamazaki, K. Usami, Y. Nakamura.:
    "Bidirectional conversion between microwave and light via ferromagnetic magnons"
    Physical Review B 93, p.174427 (2016)
  • 8. Y. Tabuchi, S. Ishino, A. Noguchi, T. Ishikawa, R. Yamazaki, K. Usami, Y. Nakamura.:
    "Coherent coupling between a ferromagnetic magnon and a superconducting qubit"
    Science 348, pp.405-408 (2015)
  • 9. Y.Tabuchi, S. Ishino, T. Ishikawa, R. Yamazaki, K. Usami, Y. Nakamura.:
    "Hybridizing ferromagnetic magnons and microwave photons in the quantum limit"
    Physical Review Letters 113, p.083603 (2014)
  • 10. Y. Tabuchi, M. Negoro, K. Takeda, M. Kitagawa.:
    "Total compensation of pulse transients inside a resonator"
    Journal of Magnetic Resonance 204, pp.327-334 (2010).

Lab Members

Principal investigator

Yutaka Tabuchi
Unit Leader

Core members

Yosuke Ueno
Special Postdoctoral Researcher
Bunpei Masaoka
Technical Staff I
Miyuki Ozawa
Technical Staff I
Kazuhisa Ogawa
Visiting Scientist
Teruo Tanimoto
Visiting Scientist
Naoyuki Masumoto
Visiting Scientist
Toshio Mori
Visiting Scientist
Takafumi Miyanaga
Visiting Scientist


Position Deadline
Seeking a few Postdoctoral Researchers (W23333) Open until filled

Contact Information

Room 403, Bldg. S02, 2-1 Hirosawa, Wako, Saitama
351-0198, Japan
Tel: +81-(0)48-462-1111(Ext.3259)
Fax: +81-(0)48-462-6847
Email: yutaka.tabuchi [at] riken.jp