RIKEN Center for Quantum Computing Superconducting Quantum Computing System Research Unit

Unit Leader: Yutaka Tabuchi (Ph.D.)

Japanese Page

Research Summary

We pursue a practical arrangement of superconducting quantum computers. We anticipate fully utilizing the quantum mechanical properties of qubits in superconducting circuits by considering a system ranging from device structures, peripheral circuits, wiring, and control methods to computer architectures. We research the integration of superconducting quantum circuits and explore the organization of quantum computers. Through three-dimensional integration based on wafer bonding technology, design of superconducting quantum circuits integrated at the system level, and architectural research based on bottleneck analysis of computer performance, we aim to improve the performance and scalability of the entire system.

Main Research Fields

Mathematical & Physical Sciences

Related Research Fields

Engineering
Informatics
Interdisciplinary Science & Engineering
Semiconductors, optical properties of condensed matters and atomic physics related
Nanostructual physics-related
Electron device and electronic equipment-related

Keywords

Quantum computer
Superconducting electronics
Microfabrication
Quantum Technology

Selected Publications

1. S. Watanabe, Y. Tabuchi, K. Heya, S. Tamate, Y. Nakamura
"ZZ-interaction-free single-qubit-gate optimization in superconducting qubits"
Phys. Rev. A 109, 012616 (2024)
2. Y. Ueno, Y. Tomida, T. Tanimoto, M. Tanaka, Y. Tabuchi, K. Inoue, H. Nakamura
"Inter-temperature Bandwidth Reduction in Cryogenic QAOA Machines"
IEEE Computer Architecture Letters 23, 9 – 12 (2024)
3. Y. Ueno, M. Kondo, M. Tanaka, Y. Suzuki, Y. Tabuchi
"QULATIS: A Quantum Error Correction Methodology toward Lattice Surgery"
28th IEEE International Symposium on High-Performance Computer Architecture (HPCA), 274-287 (2022)
4. Y. Ueno, M. Kondo, M. Tanaka, Y. Suzuki, Y. Tabuchi:
"QECOOL: On-Line Quantum Error Correction with a Superconducting Decoder for Surface Code"
58th IEEE/ACM Design Automation Conference (DAC), pp. 451-456 (2021)
5. 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)
6. 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)
7. 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)
8. 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)
9. 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)
10. 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)

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
Shigeru Kawakami: Technical Staff I
Kazuhisa Ogawa: Visiting Scientist
Teruo Tanimoto: Visiting Scientist
Naoyuki Masumoto: Visiting Scientist
Toshio Mori: Visiting Scientist
Takafumi Miyanaga: Visiting Scientist
Kosuke Miyaji: Visiting Scientist

Careers

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

Contact Information

Room 404, Cooperation Center S41
2-1 Hirosawa, Wako, Saitama
351-0198, Japan
Email: yutaka.tabuchi@riken.jp