Yasunobu Nakamura

Director, RIKEN Center for Quantum Computing
Team Leader, Superconducting Quantum Electronics Research Team
Director, RIKEN RQC-FUJITSU Collaboration Center 


We study quantum information physics and engineering in superconducting circuits. The targets of our research include quantum information processing and ultra-sensitive measurement based on quantum mechanical properties of the circuits. Superconducting quantum circuits offer excellent tools for the purposes thanks to their low dissipation and large nonlinearity.

Research Theme

・Superconducting quantum computing
・Microwave quantum optics in superconducting circuits
・Hybrid quantum systems

Representative Research Results

・“Coherent control of macroscopic quantum states in a single-Cooper-pair box”, Y. Nakamura,
Yu.A. Pashkin, and J. S. Tsai, Nature 398, 786 (1999).

・“Coherent quantum dynamics of a superconducting flux-qubit”, I. Chiorescu, Y. Nakamura,
C.J.P.M. Harmans and J.E. Mooij, Science 299, 1869 (2003).

・“Resonance fluorescence of a single artificial atom”, O. Astafiev, A. M. Zagoskin, A. A.
Abdumalikov, Jr., Yu. A. Pashkin, T. Yamamoto, K. Inomata, Y. Nakamura, and J.S. Tsai, Science 327, 840 (2010).

・“Coherent coupling between a ferromagnetic magnon and a superconducting qubit”, Y.
Tabuchi, S. Ishino, A. Noguchi, T. Ishikawa, R. Yamazaki, K. Usami, and Y.
Nakamura, Science 349, 405 (2015).

・“Quantum non-demolition detection of an itinerant microwave photon”, S. Kono, K. Koshino,Y. Tabuchi, A. Noguchi, and Y.
Nakamura, Nature Physics 14, 546 (2018).


Sixteen-qubit chip for a superconducting quantum computer (chip size = 1x1 cm2)

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