Quantum Computing Algorithm Section

Conduct research on quantum algorithms from the viewpoint of mathematical and information theory. In particular, we promote research on new quantum algorithms with large-scale quantum computing and classical-quantum hybrid computing.

Selected Papers/Talks

  • Keiichiro Yamamura, Haruki Sato, Nariaki Tateiwa, Nozomi Hata, Toru Mitsutake, Issa Oe, Hiroki Ishikura, and Katsuki Fujisawa, “Diversified Adversarial Attacks based on Conjugate Gradient Method,” In Proc. of 39th Intl. Conf. on Machine Learning (ICML ‘22), PMLR 162:24851-24871, July 2022.
  • Nariaki Tateiwa, Yuji Shinano, Satoshi Nakamura, Akihiro Yoshida, Shizuo Kaji, Masaya Yasuda, and Katsuki Fujisawa, “Massive Parallelization for Finding Shortest Lattice Vectors Based on Ubiquity Generator Framework,” In Proc. of the Intl. Conf. for High Performance Computing, Networking, Storage, and Analysis (SC ‘20), pp. 1-15, Nov. 2020.
  • Masao Hirokawa, “The Rabi model gives off a flavor of spontaneous SUSY breaking,” Quantum Stud.: Math. Found, 2:379-388, May 2015.

Selected Research Topics

  • Theoretical research into quantum simulation, quantum sensing, and quantum computing using quantum processors

Quantum Computing Software Section

Conduct research on quantum software in general from the viewpoint of computer engineering. In particular, we promote research on programming models, library construction, software development support, etc., with large-scale quantum computing and classical-quantum hybrid computing.

Selected Papers/Talks

  • Pengzhan Zhao, Jianjun Zhao, Zhongtao Miao, and Shuhan Lan, “Bugs4Q: A Benchmark of Real Bugs for Quantum Programs,” In Proc. of 36th IEEE/ACM Intl. Conf. on Automated Software Engineering (ASE ‘21), pp.1373-1376, Nov. 2021.

Selected Research Topics

  • Quantum program debugging, testing, and verification
  • Quantum programming language

Quantum Computing Architecture Section

Conduct research on quantum computer architecture in general from the viewpoint of computer engineering. In particular, we promote research on microarchitecture, system architecture (including memory systems), compilers, operating systems, system hierarchies, etc., with large-scale quantum computing and classical-quantum hybrid computing.

Selected Papers/Talks

  • Haruki Kiyama, Alexander Korsch, Naomi Nagai, Yasushi Kanai, Kazuhiko Matsumoto, Kazuhiko Hirakawa, and Akira Oiwa, “Single-electron Charge Sensing in Self-assembled Quantum Dots,” Scientific Reports 8, 13188 1-6, Sep. 2018.
  • Yasunari Suzuki, Takanori Sugiyama, Tomochika Arai, Wang Liao, Koji Inoue, and Teruo Tanimoto, “Q3DE: A fault-tolerant quantum computer architecture for multi-bit burst errors by cosmic rays,” In Proc. of IEEE/ACM Intl. Symp. on Microarchitecture (MICRO-55), Oct. 2022 (to appear). (acceptance rate: 83/366=22%)
  • Ilkwon Byun, Junpyo Kim, Dongmoon Min, Ikki Nagaoka, Kosuke Fukumitsu, Iori Ishikawa, Teruo Tanimoto, Masamitsu Tanaka, Koji Inoue, and Jangwoo Kim, “XQsim: Modeling Cross-Technology Control Processors for 10+K Qubit Quantum Computers,” In Proc. of ACM/IEEE Intl. Symp. on Comp. Arch. (ISCA ‘22), pp.366-382, June 2022.
  • Koki Ishida, Il-Kwon Byun, Ikki Nagaoka, Kosuke Fukumitsu, Masamitsu Tanaka, Satoshi Kawakami, Teruo Tanimoto, Takatsugu Ono, Jangwoo Kim, and Koji Inoue, “SuperNPU: Architecting an Extremely Fast Neural Processing Unit Using Superconducting Logic Devices,” In Proc. of 53rd IEEE/ACM Intl. Symp. on Microarchitecture (MICRO-53), pp.58-72, Oct. 2020.
    (Selected to IEEE Micro’s TopPicks ‘22 as “Superconductor Computing for Neural Networks”)

Selected Research Topics

Quantum Computing Device Section

Conduct research on creating new qubits from the viewpoints of physics, materials, devices, and process engineering. We also promote research of emerging devices for large-scale quantum computing and classical-quantum hybrid computing, such as optical/quantum interfaces and devices operating at cryogenic temperatures.

Selected Papers/Talks

  • Shu Kanno and Tomofumi Tada, “Many-body calculations for periodic materials via restricted Boltzmann machine-based VQE”, Quantum Sci. Technol. 6, 025015, Feb. 2021.
  • H. Kiyama, K. Yoshimi, T. Kato, T. Nakajima, A. Oiwa, and S. Tarucha, “Preparation and readout of multielectron high-spin states in a gate-defined GaAs/AlGaAs quantum dot,” Phys. Rev. Lett. 127, 086802 1-6, Aug. 2021.
  • T. Dion, D. M. Arroo, K. Yamanoi, T. Kimura, J. C. Gartside, L. F. Cohen, H. Kurebayashi, and W. R. Branford, “Tunable magnetization dynamics in artificial spin ice via shape anisotropy modification,” Phys. Rev. B 100, 054433-1-11, Aug. 2019.

Selected Research Topics

  • Developments of reconfigurable quantum superconducting devices based on rotational spin current
  • Many-body calculations for periodic materials via restricted Boltzmann machine-based VQE
  • Semiconductor spin qubits

Quantum Computing Application Exploration and Social Cooperation Section

Pioneer applied technologies with social applications of quantum computers. This section also builds an ecosystem to create new science and technology regarding industries related to quantum computer technologies. We will accelerate technological exchanges, joint research, human resource development, and joint projects based on collaboration with domestic and foreign organizations.

Selected Research Projects