arXiv papers
arXiv papers
Compressed space quantum approximate optimization algorithm for constrained combinatorial optimization
Tatsuhiko Shirai and Nozomu Togawa, IEEE Transactions on Quantum Engineering (Early Access). [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 (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]
Multi-spin-flip engineering in an Ising machine
Tatsuhiko Shirai and Nozomu Togawa, IEEE Transactions on Computers 72, 759 (2022). [link] [Press (Univ)]
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
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]
Long-time asymptotic states in periodically driven open quantum systems [link]
Tatsuhiko Shirai
Doctor thesis, Department of Physics, Graduate School of Science (March, 2016)
Nonequilibrium phase transitions induced by interactions between photon and material in a cavity
Tatsuhiko Shirai
Master thesis, Department of Physics, Graduate School of Science (March, 2013)