Publications
2024
*Somnath Maity and Ryusuke Hamazaki,
Kinetically constrained models constructed from dissipative quantum dynamics,
*Taro Sawada, Kazuki Sone, Ryusuke Hamazaki, Yuto Ashida, and Takahiro Sagawa,
Role of Topology in Relaxation of One-Dimensional Stochastic Processes,
Phys. Rev. Lett. 132, 046602 (2024). [arXiv:2301.09832]
プレスリリース「確率的ダイナミクスの緩和におけるトポロジーの効果を解明 －古典系のトポロジカルな設計原理の解明に向けて－」
*Ryusuke Hamazaki,
Quantum Velocity Limits for Multiple Observables: Conservation Laws, Correlations, and Macroscopic Systems
Phys. Rev. Research 6, 013018 (2024). [arXiv:2305.03190]
*Ken Mochizuki and Ryusuke Hamazaki,
Absorption to Fluctuating Bunching States in Non-Unitary Boson Dynamics,
Phys. Rev. Research 6, 013004 (2024). [arXiv:2308.04716]
2023
*Taiki Haga, Masaya Nakagawa, Ryusuke Hamazaki, and Masahito Ueda,
Quasiparticles of Decoherence Processes in Open Quantum Many-Body Systems: Incoherentons,
Phys. Rev. Research 5, 043225 (2023). [arXiv:2211.14991]
*Yuta Sekino, Yuya Ominato, Hiroyuki Tajima, Shun Uchino, and Mamoru Matsuo,
Thermomagnetic Anomalies by Magnonic Criticality in Ultracold Atomic Transport,
*Hiroyuki Tajima, Hiroshi Funaki, Yuta Sekino, Nobutoshi Yasutake, and Mamoru Matsuo,
Exploring 3P0 superfluid in dilute spin-polarized neutron matter,
Phys. Rev. C 108, L052802 [Letter] (2023).
*Ryusuke Hamazaki
Limits to Fluctuation Dynamics,
*Osamu Fukushima and Ryusuke Hamazaki,
Violation of Eigenstate Thermalization Hypothesis in Quantum Field Theories with Higher-Form Symmetry,
Phys. Rev. Lett. 131, 131602 (2023). [arXiv:2305.04984]
*Kazuki Yamamoto and Ryusuke Hamazaki,
Localization Properties in Disordered Quantum Many-Body Dynamics under Continuous Measurement,
Phys. Rev. B 197, L220201 [Letter] (2023). [arXiv:2301.07290]
*Shoki Sugimoto, Ryusuke Hamazaki, and Masahito Ueda,
Rigorous Bounds on Eigenstate Thermalization,
*Ken Mochizuki and Ryusuke Hamazaki,
Distinguishability transitions in nonunitary boson-sampling dynamics,
2022
*Atsuki Yoshinaga, Yuichiro Matsuzaki, and Ryusuke Hamazaki,
Quantum Metrology Protected by Hilbert Space Fragmentation,
*Zongping Gong and Ryusuke Hamazaki,
Bounds in Nonequilibrium Quantum Dynamics,
International Journal of Modern Physics B [arXiv:2202.02011] (invited review article)
*Kazuya Fujimoto, Ryusuke Hamazaki, and Yuki Kawaguchi,
Impact of Dissipation on Universal Fluctuation Dynamics in Open Quantum Systems,
Phys. Rev. Lett. 129, 110403 (2022). [arXiv:2202.02176]
*Atsuki Yoshinaga, Hideaki Hakoshima, Takashi Imoto, Yuichiro Matsuzaki, and Ryusuke Hamazaki,
Emergence of Hilbert Space Fragmentation in Ising Models with a Weak Transverse Field,
Phys. Rev. Lett. 129, 090602 (2022). [arXiv:2111.05586]
*Shoki Sugimoto, Ryusuke Hamazaki, and Masahito Ueda,
Eigenstate Thermalization in Long-Range Interacting Systems,
Phys. Rev. Lett. 129, 030602 (2022). [arXiv:2111.12484]
*Makio Kawasaki, Ken Mochizuki, and Hideaki Obuse,
Topological phases protected by shifted sublattice symmetry in dissipative quantum systems,
Phys. Rev. B 106, 035408 (2022).
*龔 宗平, 濱崎立資
岩波書店「科学」2022年6月号 (Vol.92 No.6)への寄稿論文
*Ryusuke Hamazaki, Masaya Nakagawa, Taiki Haga, and Masahito Ueda,
Lindbladian Many-Body Localization,
*Kyosuke Adachi, Ryosuke Iritani, and Ryusuke Hamazaki,
Universal constraint on nonlinear population dynamics,
Communications Physics 5, 129 (2022). [arXiv:2202.02028]
プレスリリース「進化・生態ダイナミクスの共通法則 －生物の個体群変化を物理学的な関係式で記述する－」
*Ken Mochizuki and Tomoki Ozawa,
Band structures under non-Hermitian periodic potentials: Connecting nearly-free and bi-orthogonal tight-binding models,
Phys. Rev. B 105, 174108 (2022).
*Ryusuke Hamazaki,
Speed Limits for Macroscopic Transitions,
PRX Quantum 3, 020319 (2022). [arXiv:2110:09716]
プレスリリース「巨視的な遷移における速度限界の発見 －連続の式に基づく統一的アプローチ－」
RIKEN Research Highlights に記事として取り上げていただきました。
2021
*Ryusuke Hamazaki,
Exceptional dynamical quantum phase transitions in periodically driven systems,
Nat. Commun. 12, 5108 (2021). [arXiv:2012.11822]
Selected in a collection of Quantum Many-Body Dynamics.
プレスリリース「新しいメカニズムによる動的量子相転移を発見 -反ユニタリー対称性の自発的破れ-」
マイナビニュースでも取り上げていただきました。
*Kazuya Fujimoto, Ryusuke Hamazaki, and Yuki Kawaguchi,
Dynamical Scaling of Surface Roughness and Entanglement Entropy in Disordered Fermion Models,
Phys. Rev. Lett. 127, 090601 (2021). [arXiv:2101.08148]
プレスリリース 「乱れた量子系における粒子数揺らぎと量子もつれの成長則を発見 -コーヒーの染みの広がりとの意外なつながり-」
マイナビニュースでも取り上げていただきました。
Press release from EurekAlert!
*藤本和也、濱崎立資、川口由紀、
孤立量子系の粒子数揺らぎに現れる界面粗さスケーリング、
日本物理学会誌, 最近の研究から, 76, 517 (2021).
*Taiki Haga, Masaya Nakagawa, Ryusuke Hamazaki, and Masahito Ueda,
Liouvillian Skin Effect: Slowing Down of Relaxation Processes without Gap Closing,
Phys. Rev. Lett. 127, 070402 (2021). [arXiv:2005.00824]
*Shoki Sugimoto, Ryusuke Hamazaki, and Masahito Ueda,
Test of Eigenstate Thermalization Hypothesis Based on Local Random Matrix Theory,
2020
*Yosuke Takasu, Tomoya Yagami, Yuto Ashida, Ryusuke Hamazaki, Yoshihito Kuno, and Yoshiro Takahashi,
PT-symmetric non-Hermitian quantum many-body system using ultracold atoms in an optical lattice with controlled dissipation,
Progress of Theoretical and Experimental Physics, ptaa094 (2020). [arXiv:2004.05734]
（解説）
JPS Hot Topicsによる解説動画
*Xiao Chai, Di Lao, Kazuya Fujimoto, Ryusuke Hamazaki, Masahito Ueda, and Chandra Raman,
Magnetic solitons in a spin-1 Bose-Einstein condensate,
Phys. Rev. Lett. 125, 030402 (2020). [arXiv:1912.06672]
Selected as Editor's Suggestion.
*Ryusuke Hamazaki, Kohei Kawabata, Naoto Kura and Masahito Ueda,
Universality classes of non-Hermitian random matrices,
Phys. Rev. Research, 2, 023286 (2020). [arXiv:1904.13082]
*Kazuya Fujimoto, Ryusuke Hamazaki, and Yuki Kawaguchi,
Family-Vicsek Scaling of Roughness Growth in a Strongly Interacting Bose Gas,
Phys. Rev. Lett. 124, 210604 (2020). [arXiv:1911.10707]
*Zongping Gong, Nobuyuki Yoshioka, Naoyuki Shibata, and Ryusuke Hamazaki,
Universal Error Bound for Constrained Quantum Dynamics,
Phys. Rev. Lett. 124, 210606 (2020). [arXiv:2001.03419]
*Zongping Gong, Nobuyuki Yoshioka, Naoyuki Shibata, and Ryusuke Hamazaki,
Error bounds for constrained dynamics in gapped quantum systems: Rigorous results and generalizations,
Phys. Rev. A 101, 052122 (2020). [arXiv:2001.03421]
2019
*Ryusuke Hamazaki, Kohei Kawabata and Masahito Ueda,
Non-Hermitian Many-Body Localization,
Phys. Rev. Lett. 123, 090603 (2019). [arXiv:1811.11319]
*Nobuyuki Yoshioka and Ryusuke Hamazaki,
Constructing neural stationary states for open quantum many-body systems,
Phys. Rev. B 99, 214306 (2019). [arXiv:1902.07006]
Selected as Editor's Suggestion.
Featured in Physics, see also Viewpoint in Physics 12, 74 by Maria Schuld, Ilya Sinayskiy, and Francesco Petruccione.
（解説）
研究室の扉「ニューラルネットワークでみる量子の世界」(YouTubeでの解説)
UTokyoFOCUSでのプレスリリース 「無限時間経過後の量子状態を表すニューラルネットワークの構築に成功」
Quantum research with neural networks (English version)
ニューラルネットワークで「開いた量子系」を学習する – 機械学習と量子物理学の融合（アカデミストジャーナルの解説記事）
*Kazuya Fujimoto, Ryusuke Hamazaki and Masahito Ueda,
Flemish Strings of Magnetic Solitons and a Non-Thermal Fixed Point in a One-Dimensional Antiferromagnetic Spin-1 Bose Gas,
Phys. Rev. Lett. 122, 173001 (2019). [arxiv:1812.03581]
*Ryusuke Hamazaki and Masahito Ueda,
Random-matrix behavior of quantum nonintegrable many-body systems with Dyson’s three symmetries,
2018
*Ryusuke Hamazaki, Kazuya Fujimoto and Masahito Ueda,
Operator Noncommutativity and Irreversibility in Quantum Chaos,
*Ryusuke Hamazaki and Masahito Ueda,
Atypicality of Most Few-Body Observables,
Phys. Rev. Lett. 120, 080603 (2018). [arxiv:1708.04772]
*Kazuya Fujimoto, Ryusuke Hamazaki and Masahito Ueda,
Unconventional Universality Class of One-Dimensional Isolated Coarsening Dynamics in a Spinor Bose Gas,
Phys. Rev. Lett. 120, 073002 (2018). [arxiv:1707.03615]
*Zongping Gong, Ryusuke Hamazaki and Masahito Ueda,
Discrete Time-Crystalline Order in Cavity and Circuit QED Systems,
2016
*Ryusuke Hamazaki, Tatsuhiko N. Ikeda and Masahito Ueda,
Generalized Gibbs ensemble in a nonintegrable system with an extensive number of local symmetries,