論文

• Compressed space quantum approximate optimization algorithm for constrained combinatorial optimization

Tatsuhiko Shirai and Nozomu Togawa, IEEE Transactions on Quantum Engineering 6, 3102214 (2024). [link] arXiv:2410.05703.

• Out-of-time-order correlator computation based on discrete truncated Wigner approximation

Tatsuhiko Shirai and Takashi Mori, Physical Review B 112, 014309 (2025). [link] arXiv:2501.14221.

• Hybrid Iterative Annealing Method Using a Quantum Annealer and a Classical Computer and its Evaluation

Keisuke Fukada, Tatsuhiko Shirai and Nozomu Togawa, IEICE Transactions on Fundamentals of Electronics E108A, 460 (2025). [link]

• Accelerated Decay due to Operator Spreading in Bulk-Dissipated Quantum Systems

Tatsuhiko Shirai and Takashi Mori, Physical Review Letters 133, 040201 (2024). [link] arXiv:2309.03485.

• Toward Practical Benchmarks of Ising Machines: A Case Study on the Quadratic Knapsack Problem

Kentaro Ohno, Tatsuhiko Shirai and Nozomu Togawa, IEEE Access 12, 97678 (2024). [link] arXiv:2403.19175.

• Ising machine approach to the lecturer-student assignment problem

Sora Tomita, Tatsuhiko Shirai, and Nozomu Togawa, IEEE Access 12, 49752 (2024). [link]

• A GPU-based Ising Machine with a Multi-spin-flip Capability for Constrained Combinatorial Optimization

Satoru Jimbo, Tatsuhiko Shirai, Nozomu Togawa, Masato Motomura, and Kazushi Kawamura, IEEE Access 12, 43660 (2024). [link]

• Post-processing variational quantum algorithm for constrained combinatorial optimization problems

Tatsuhiko Shirai and Nozomu Togawa, IEEE Transactions on Quantum Engineering 5, 3101114 (2024). [link] [Press JPN(Univ, JST), ENG(Univ)] arXiv:2309.08120. 

• Symmetrized Liouvillian Gap in Markovian Open Quantum Systems

Takashi Mori and Tatsuhiko Shirai, Physical Review Letters 130, 230404 (2023).[link] arXiv:2212.06317. 

• Spin-Variable Reduction Method for Handling Linear Equality Constraints in Ising Machines

Tatsuhiko Shirai and Nozomu Togawa, IEEE Transactions on Computers 72, 2151 (2023). [link] [Press (Univ, JST)]

• Multi-spin-flip engineering in an Ising machine

Tatsuhiko Shirai and Nozomu Togawa, IEEE Transactions on Computers 72, 759 (2022). [link] [Press JPN(Univ., JST), ENG(Univ)][patent]

• Exact bounds for dynamical critical exponents of transverse-field Ising chains with a correlated disorder

Tatsuhiko Shirai and Shu Tanaka, Annals of Physics 435, 168483 (2021). [link] arXiv:2007.07439

• Performance comparison of typical binary-integer encodings in an Ising machine

Kensuke Tamura, Tatsuhiko Shirai, Hosho Katsura, Shu Tanaka, and Nozomu Togawa, IEEE Access 9, 81032 (2021). [link]

• Tensor-network approach to thermalization in open quantum many-body systems

Hayate Nakano, Tatsuhiko Shirai and Takashi Mori, Physical Review E 103, L040102 (2021). [link] arXiv:2012.12274

• Guiding Principle  for Minor-Embedding in Simulated-Annealing-Based Ising machines

Tatsuhiko Shirai, Shu Tanaka, and Nozomu Togawa, IEEE Access 8, 210490 (2020). [link] arXiv:2012.02372

• Resolving Discrepancy between Liouvillian Gap and Relaxation Time in Boundary-Dissipated Quantum Many-Body Systems

Takashi Mori and Tatsuhiko Shirai, Physical Review Letters 125, 230604 (2020). [link] arXiv:2006.10953

• Thermalization in open many-body systems based on eigenstate thermalization hypothesis

Tatsuhiko Shirai, and Takashi Mori, Physical Review E 101, 042116 (2020). [link] arXiv:1812.09713

• Dynamical phase transition in Floquet optical bistable systems: An approach from finite-size quantum systems 

Tatsuhiko Shirai,  Synge Todo, and Seiji Miyashita, Physical Review A 101, 013809 (2020). [link] arXiv:1910.10618

• Microscopic description of yielding in glass by persistent homology 

Tatsuhiko Shirai, and Takenobu Nakamura, Journal of the Physical Society of Japan 88, 074801 (2019). [link] arXiv:1712.09785

• Optical bistability in a low photon-density regime

Tatsuhiko Shirai,  Hans de Raedt, Synge Todo, and Seiji Miyashita, Physical Review A 98, 043802 (2018). [link] arXiv:1804.09853

• Floquet-Gibbs state in open quantum systems 

Tatsuhiko Shirai, Takashi Mori, and Seiji Miyashita, The European Physical Journal Special Topics 227, 323 (2018). [link] arXiv:1801.02838 

• Effective Floquet-Gibbs states for dissipative quantum systems 

Tatsuhiko Shirai, Juzar Thingna, Takashi Mori, Sergey Denisov, Peter Hänggi, and Seiji Miyashita, New Journal of Physics 18, 053008 (2016). [link] arXiv:1511.06864 

• Condition for emergence of the Floquet-Gibbs state in periodically driven open systems 

Tatsuhiko Shirai, Takashi Mori, and Seiji Miyashita, Physical Review E 91, 030101(R) (2015). [link] arXiv:1410.0464

• Novel symmetry-broken phase in a driven cavity system in the thermodynamic limit

Tatsuhiko Shirai, Takashi Mori, and Seiji Miyashita, Journal of Physics B: Atomic, Molecular and Optical Physics  47, 025501 (2013). [link] arXiv:1204.5516

• Photon and spin dependence of the resonance line shape in the strong coupling regime

Seiji Miyashita, Tatsuhiko Shirai, Takashi Mori, Hans De Raedt, Sylvain Bertaina, and Irinel Chiorescu, Journal of Physics B: Atomic, Molecular and Optical Physics 45, 124010 (2012). [link] arXiv:1206.2394

国際会議論文

• Searching Candidate Sequences for RNA Aptamers Using Quantum Computation

Sora Tomita, Tatsuhiko Shirai, Michiaki Hamada, Tatsuo Adachi, and Nozomu Togawa, 2025 IEEE International Conference on Consumer Electronics (ICCE), 1 (2025).[link]

• Personalized Course Selection Optimization Using QAOA

Takeru Ota, Keisuke Fukada, Tatsuhiko Shirai, and Nozomu Togawa, 2025 IEEE International Conference on Consumer Electronics (ICCE), 1 (2025).[link]

• Large-Sized VQE Performance Profiling in Quantum Chemistry Using a Multi-Node Quantum Simulator

Keisuke Fukada, Tatsuhiko Shirai, Mikio Morita, Yoshinori Tomita, Koichi Kimura, Nozomu Togawa, 2024 IEEE International Conference on Quantum Computing and Engineering (QCE) 2, 432 (2024).[link] 

• Variable Reduction Method for Quadratic Three-Dimensional Assignment Problem with FMQA

Sora Tomita, Tatsuhiko Shirai, Nozomu Togawa, 2024 IEEE International Conference on Quantum Computing and Engineering (QCE) 2, 404 (2024).[link]

• Hybrid Iterative Annealing Method Using a Quantum Annealer and a Classical Computer

Keisuke Fukada, Tatsuhiko Shirai, and Nozomu Togawa, 2024 IEEE International Conference on Consumer Electronics (ICCE), 1 (2024).[link] [Award]

• Optimization of Practical Time-Dependent Vehicle Routing Problem by Ising Machines

Yui Tsuyumine, Kenichi Masuda, Takeshi Hachikawa, Tsuyoshi Haga, Yuta Yachi, Tatsuhiko Shirai, Masashi Tawada, Nozomu Togawa, 2024 IEEE International Conference on Consumer Electronics (ICCE), 1 (2024).[link] 

• QUBO matrix distorting method for consumer applications

Tomokazu Yoshimura, Tatsuhiko Shirai, Masashi Tawada, and Nozomu Togawa, 2022 IEEE International Conference on Consumer Electronics (ICCE), 1 (2022).[link] 

学位論文

• Long-time asymptotic states in periodically driven open quantum systems [link]

白井達彦

学位論文、東京大学理学系研究科 物理学専攻(2016年3月)

• Nonequilibrium phase transitions induced by interactions between photon and material in a cavity 

白井達彦

修士論文、東京大学理学系研究科 物理学専攻(2013年3月)