Publication

Articles

July 14, 2017 RIKEN RESEARCH
Physicists solve ETH Zurich quantum point contact mystery
Near superfluid conditions prompt atoms to form pairs to pass through a narrow gate, finds a new mathematical
　　　　 analysis
Nov 27, 2015 RIKEN RESEARCH
A sensitive approach to atom counting
Measurements of scattered photons can be used to detect the number of atoms trapped in the troughs of an
　　　　 optical lattice
Mar 20, 2015 RIKEN RESEARCH
The universal nature of three-body attraction
A study of the interaction among three objects in peculiar resonant systems uncovers an unexpected universality
Jan 28, 2015 RIKEN RESEARCH
Particles find their mass
Simulations indicate that a peculiar state of matter at close to absolute zero could be used to observe an elusive
　　　　 quantum phenomenon called quantum mass acquisition

Selected Publications

"Experimental Observation of the Yang-Lee Quantum Criticality in Open Quantum Systems"
Huixia Gao, Kunkun Wang, Lei Xiao, Masaya Nakagawa, Norifumi Matsumoto, Dengke Qu, Haiqing Lin, Masahito Ueda, and Peng Xue
Phys. Rev. Lett. 132, 176601 (2024)
"Hermitian and non-Hermitian topology from photon-mediated interactions"
Federico Roccati, Miguel Bello, Zongping Gong, Masahito Ueda, Francesco Ciccarello, Aurélia Chenu,and Angelo Carollo
Nature Communications volume 15, Article number: 2400 (2024)
"Phase crossover induced by dynamical many-body localization in periodically driven long-range spin systems"
Mahbub Rahaman, Takashi Mori, and Analabha Roy
Phys. Rev. B 109, 104311 (2024)
"Liouvillian-gap analysis of open quantum many-body systems in the weak dissipation limit"
Takashi Mori
Phys. Rev. B 109, 064311 (2024)
"Stalled response near thermal equilibrium in periodically driven systems"
Lennart Dabelow and Peter Reimann
Nature Communications volume 15, Article number: 294 (2024)
"Zeroth, first, and second-order phase transitions in deep neural networks"
Liu Ziyin and Masahito Ueda
Phys. Rev. Research 5, 043243 (2023)
"Quasiparticles of decoherence processes in open quantum many-body systems: Incoherentons"
Taiki Haga, Masaya Nakagawa, Ryusuke Hamazaki, and Masahito Ueda
Phys. Rev. Research 5, 043225 (2023)
"Yang-Lee Zeros, Semicircle Theorem, and Nonunitary Criticality in Bardeen-Cooper-Schrieffer Superconductivity"
Hongchao Li, Xie-Hang Yu, Masaya Nakagawa, and Masahito Ueda
Phys. Rev. Lett. 131, 216001 (2023)
"Accelerated Decay due to Operator Spreading in Bulk-Dissipated Quantum Systems"
Tatsuhiko Shirai and Takashi Mori
arXiv preprint arXiv:2309.03485 (2023)
"Symmetrized Liouvillian Gap in Markovian Open Quantum Systems"
Takashi Mori and Tatsuhiko Shirai
Phys. Rev. Lett. 130, 230404 (2023)
"Quantum and classical Floquet prethermalization"
Wen Wei Ho, Takashi Mori, Dmitry A. Abanin and Emanuele G. Dalla Torre
Annals of Physics, volume 454, 169297 (2023)
"Floquet States in Open Quantum Systems"
Takashi Mori
Annual Review of Condensed Matter Physics, vol. 14:35-56 (2023)
"Universal thermodynamic uncertainty relation in nonequilibrium dynamics"
Liu Ziyin and Masahito Ueda
Phys. Rev. Research 5, 013039 (2023)
"Nonlinear Landauer formula: Nonlinear response theory of disordered and topological materials"
Kohei Kawabata and Masahito Ueda
Phys. Rev. B 106, 205104 (2022)
"Embedding the Yang-Lee quantum criticality in open quantum systems"
Norifumi Matsumoto, Masaya Nakagawa, and Masahito Ueda
Phys. Rev. Research 4, 033250 (2022)
"Three learning stages and accuracy–efficiency tradeoff of restricted Boltzmann machines"
Lennart Dabelow and Masahito Ueda
Nature Communications volume 13, Article number: 5474 (2022)
"Eigenstate Thermalization in Long-Range Interacting Systems"
Shoki Sugimoto, Ryusuke Hamazaki, and Masahito Ueda
Phys. Rev. Lett. 129, 030602 (2022)
"Power-Law Escape Rate of SGD"
Takashi Mori, Liu Ziyin, Kangqiao Liu, Masahito Ueda
Proceedings of the 39th International Conference on Machine Learning, PMLR 162:15959-15975 (2022)
"Universal properties of dissipative Tomonaga-Luttinger liquids: Case study of a non-Hermitian XXZ spin chain"
Kazuki Yamamoto, Masaya Nakagawa, Masaki Tezuka, Masahito Ueda, and Norio Kawakami
Phys. Rev. B 105, 205125 (2022)
"Vortex lattices in binary Bose–Einstein condensates: collective modes, quantum fluctuations, and intercomponent entanglement"
Takumi Yoshino, Shunsuke Furukawa, and Masahito Ueda
Journal of Physics B: Atomic, Molecular and Optical Physics, Volume 55, Number 10(2022)
"Heating Rates under Fast Periodic Driving beyond Linear Response"
Takashi Mori
Phys. Rev. Lett. 128, 050604 (2022)
"Interplay between depth of neural networks and locality of target functions"
Takashi Mori and Masahito Ueda
arXiv:2201.12082(2022)
"Thermalization of locally perturbed many-body quantum systems"
Lennart Dabelow, Patrick Vorndamme, and Peter Reimann
Phys. Rev. B 105, 024310 (2022)
"Quantum Dark Solitons in the 1D Bose Gas: From Single to Double Dark-Solitons"
Kayo Kinjo, Eriko Kaminishi, Takashi Mori, Jun Sato, Rina Kanamoto and Tetsuo Deguchi
Universe 8(1), 2 (2021)
"Metastability associated with many-body explosion of eigenmode expansion coefficients"
Takashi Mori
Phys. Rev. Research 3, 043137 (2021)
"Tensor network approach to thermalization in open quantum many-body systems"
Hayate Nakano, Tatsuhiko Shirai, and Takashi Mori
Phys. Rev. E 103, L040102 (2021)
"Rigorous Bounds on the Heating Rate in Thue-Morse Quasiperiodically and Randomly Driven Quantum Many-Body Systems"
Takashi Mori, Hongzheng Zhao, Florian Mintert, Johannes Knolle, and Roderich Moessner
Phys. Rev. Lett. 127, 050602 (2021)
"Entropy production of a closed Hamiltonian system via the detailed fluctuation relation"
Yûto Murashita, Naoto Kura, and Masahito Ueda
Phys. Rev. Research 3, 033224 (2021)
"Liouvillian Skin Effect: Slowing Down of Relaxation Processes without Gap Closing"
Taiki Haga, Masaya Nakagawa, Ryusuke Hamazaki, and Masahito Ueda
Phys. Rev. Lett. 127, 070402 (2021)
"Collective Excitations and Nonequilibrium Phase Transition in Dissipative Fermionic Superfluids"
Kazuki Yamamoto, Masaya Nakagawa, Naoto Tsuji, Masahito Ueda, and Norio Kawakami
Phys. Rev. Lett. 127, 055301 (2021)
"Noise and Fluctuation of Finite Learning Rate Stochastic Gradient Descent"
Kangqiao Liu, Liu Ziyin, and Masahito Ueda
Proceedings of the 38th International Conference on Machine Learning, PMLR 139:7045-7056, 2021 (ICML 2021)
"Intercomponent entanglement entropy and spectrum in binary Bose-Einstein condensates"
Takumi Yoshino, Shunsuke Furukawa, and Masahito Ueda
Phys. Rev. A 103, 043321 (2021)
"Test of the Eigenstate Thermalization Hypothesis Based on Local Random Matrix Theory"
Shoki Sugimoto, Ryusuke Hamazaki, and Masahito Ueda
Phys. Rev. Lett. 126, 120602 (2021)
"Exact Liouvillian Spectrum of a One-Dimensional Dissipative Hubbard Model"
Masaya Nakagawa, Norio Kawakami, and Masahito Ueda
Phys. Rev. Lett. 126, 110404 (2021)
"Non-Hermitian physics"
Yuto Ashida, Zongping Gong, and Masahito Ueda
Advances in Physics 69:3: 249-435 (2020)
"Neural Networks Fail to Learn Periodic Functions and How to Fix It"
Liu Ziyin, Tilman Hartwig, and Masahito Ueda
Advances in Neural Information Processing Systems 33 (NeurIPS 2020)
"Effective temperature of a superfluid flowing in a random potential"
Taiki Haga and Masahito Ueda
Phys. Rev. Research 2, 043316 (2020)
"Continuous Phase Transition without Gap Closing in Non-Hermitian Quantum Many-Body Systems"
Norifumi Matsumoto, Kohei Kawabata, Yuto Ashida, Shunsuke Furukawa, and Masahito Ueda
Phys. Rev. Lett. 125, 260601 (2020)
"Magnetic Solitons in a Spin-1 Bose-Einstein Condensate"
Xiao Chai, Di Lao, Kazuya Fujimoto, Ryusuke Hamazaki, Masahito Ueda, and Chandra Raman
Phys. Rev. Lett. 125, 030402 (2020) [selected as Editors' Suggestion]
See also Synopsis: Physics 13, s90 by Christopher Crockett
"Universality classes of non-Hermitian random matrices"
Ryusuke Hamazaki, Kohei Kawabata, Naoto Kura, and Masahito Ueda
Phys. Rev. Research 2, 023286 (2020)
"Resolving a Discrepancy between Liouvillian Gap and Relaxation Time in Boundary-Dissipated Quantum Many-Body Systems"
Takashi Mori and Tatsuhiko Shirai
Phys. Rev. Lett. 125, 230604 (2020)
"Thermodynamic Uncertainty Relation for Arbitrary Initial States"
Kangqiao Liu, Zongping Gong, and Masahito Ueda
Phys. Rev. Lett. 125, 140602 (2020)
"Improved generalization by noise enhancement"
Takashi Mori and Masahito Ueda
arXiv preprint arXiv:2009.13094 (2020)
"Deep Reinforcement Learning Control of Quantum Cartpoles"
Zhikang T. Wang, Yuto Ashida, and Masahito Ueda
Phys. Rev. Lett. 125, 100401 (2020)
"Higgs-mode resonance in third harmonic generation in NbN superconductors: Multiband electron-phonon coupling, impurity scattering,
and polarization-angle dependence"
Naoto Tsuji and Yusuke Nomura
Phys. Rev. Research 2, 043029 (2020)
“Construction of quantum dark soliton in one-dimensional Bose gas”
Eriko Kaminishi, Takashi Mori and Seiji Miyashita
Journal of Physics B: Atomic, Molecular and Optical Physics, Volume 53, Number 9 (2020)
"Thermalization in open many-body systems based on eigenstate thermalization hypothesis"
Tatsuhiko Shirai and Takashi Mori
Phys. Rev. E 101, 042116 (2020)
"Dynamical Sign Reversal of Magnetic Correlations in Dissipative Hubbard Models"
Masaya Nakagawa, Naoto Tsuji, Norio Kawakami, and Masahito Ueda
Phys. Rev. Lett. 124, 147203 (2020)
"Morphological Superfluid in a Nonmagnetic Spin-2 Bose-Einstein Condensate"
Emi Yukawa and Masahito Ueda
Phys. Rev. Lett. 124, 105301 (2020)
"Standard Quantum Limit and Heisenberg Limit in Function Estimation"
Naoto Kura and Masahito Ueda
Phys. Rev. Lett. 124, 010507 (2020)
"Symmetry and Topology in Non-Hermitian Physics"
Kohei Kawabata, Ken Shiozaki, Masahito Ueda, and Masatoshi Sato
Phys. Rev. X 9, 041015 (2019)
"Theory of Non-Hermitian Fermionic Superfluidity with a Complex-Valued Interaction"
Kazuki Yamamoto, Masaya Nakagawa, Kyosuke Adachi, Kazuaki Takasan, Masahito Ueda, and Norio Kawakami
Phys. Rev. Lett. 123, 123601 (2019)
"Non-Hermitian Many-Body Localization"
Ryusuke Hamazaki, Kohei Kawabata, and Masahito Ueda
Phys. Rev. Lett. 123, 090603 (2019)
"Floquet Chiral Magnetic Effect"
Sho Higashikawa, Masaya Nakagawa, and Masahito Ueda
Phys. Rev. Lett. 123, 066403 (2019)
"Flemish Strings of Magnetic Solitons and a Nonthermal Fixed Point in a One-Dimensional Antiferromagnetic Spin-1 Bose Gas"
Kazuya Fujimoto, Ryusuke Hamazaki, and Masahito Ueda 　　
Phys. Rev. Lett. 122, 173001 (2019)
"Second-Order Topological Phases in Non-Hermitian Systems"
Tao Liu, Yu-Ran Zhang, Qing Ai, Zongping Gong, Kohei Kawabata, Masahito Ueda, and Franco Nori
Phys. Rev. Lett. 122, 076801 (2019)
"Topological unification of time-reversal and particle-hole symmetries in non-Hermitian physics"
Kohei Kawabata, Sho Higashikawa, Zongping Gong, Yuto Ashida, and Masahito Ueda
Nat. Commun. 10, 297 (2019)[selected as Editors' Highlights (Link)]
Non-Hermitian Kondo Effect in Ultracold Alkaline-Earth Atoms
Masaya Nakagawa, Norio Kawakami, and Masahito Ueda
Phys. Rev. Lett. 121, 203001 (2018)
"Thermalization and Heating Dynamics in Open Generic Many-Body Systems"
Yuto Ashida, Keiji Saito, and Masahito Ueda
Phys. Rev. Lett. 121, 170402 (2018)
"Topological Phases of Non-Hermitian Systems"
Zongping Gong, Yuto Ashida, Kohei Kawabata, Kazuaki Takasan, Sho Higashikawa and Masahito Ueda
Phys. Rev. X 8, 031079 (2018)
See also Viewpoint: Physics 11, 96 by Miguel A. Bandres and Mordechai Segev
"Nonholonomy of order parameters and su(3) vortices in spin-1 Bose-Einstein condensates"
Emi Yukawa and Masahito Ueda
Phys. Rev. A 98, 013607 (2018)
"Bound on the exponential growth rate of out-of-time-ordered correlators"
Naoto Tsuji, Tomohiro Shitara, and Masahito Ueda
Phys. Rev. E 98, 012216 (2018)
"Full-Counting Many-Particle Dynamics: Nonlocal and Chiral Propagation of Correlations"
Yuto Ashida and Masahito Ueda
Phys. Rev. Lett. 120, 185301 (2018)
"Higgs Mode in the d-Wave Superconductor Bi2Sr2CaCu2O8+x Driven by an Intense Terahertz Pulse"
Kota Katsumi, Naoto Tsuji, Yuki I. Hamada, Ryusuke Matsunaga, John Schneeloch, Ruidan D. Zhong, Genda D. Gu, Hideo Aoki, Yann Gallais, and Ryo Shimano
Phys. Rev. Lett. 120, 117001 (2018)
"Quantum Szilard Engine with Attractively Interacting Bosons"
J. Bengtsson, M. Nilsson Tengstrand, A. Wacker, P. Samuelsson, M. Ueda, H. Linke, and S. M. Reimann
Phys. Rev. Lett. 120, 100601 (2018)
"Unconventional Universality Class of One-Dimensional Isolated Coarsening Dynamics in a Spinor Bose Gas"
Kazuya Fujimoto, Ryusuke Hamazaki, and Masahito Ueda
Phys. Rev. Lett. 120, 073002 (2018)
"Atypicality of Most Few-Body Observables"
Ryusuke Hamazaki and Masahito Ueda
Phys. Rev. Lett. 120, 080603 (2018)
"Discrete Time-Crystalline Order in Cavity and Circuit QED Systems"
Zongping Gong, Ryusuke Hamazaki, and Masahito Ueda
Phys. Rev. Lett. 120, 040404 (2018)
"Out-of-time-order fluctuation-dissipation theorem"
Naoto Tsuji, Tomohiro Shitara, and Masahito Ueda
Phys. Rev. E 97, 012101 (2018)
"Information Retrieval and Criticality in Parity-Time-Symmetric Systems"
Kohei Kawabata, Yuto Ashida, and Masahito Ueda
Phys. Rev. Lett. 119, 190401 (2017)
"Parity-time-symmetric quantum critical phenomena"
Yuto Ashida, Shunsuke Furukawa & Masahito Ueda
Nature Communications 8, Article number: 15791 (2017)
"Zeno Hall Effect"
Zongping Gong, Sho Higashikawa, and Masahito Ueda
Phys. Rev. Lett. 118, 200401 (2017)
"Anomalous Transport in the Superfluid Fluctuation Regime"
Shun Uchino and Masahito Ueda
Phys. Rev. Lett. 118, 105303 (2017)
"Universal Work Fluctuations During Shortcuts to Adiabaticity by Counterdiabatic Driving"
Ken Funo, Jing-Ning Zhang, Cyril Chatou, Kihwan Kim, Masahito Ueda, and Adolfo del Campo
Phys. Rev. Lett. 118, 100602 (2017)
"Gibbs Paradox Revisited from the Fluctuation Theorem with Absolute Irreversibility"
Yûto Murashita and Masahito Ueda
Phys. Rev. Lett. 118, 060601 (2017)
"Exact out-of-time-ordered correlation functions for an interacting lattice fermion model"
Naoto Tsuji, Philipp Werner, and Masahito Ueda
Phys. Rev. A 95, 011601(R) (2017)
"Emergent Electromagnetic Induction and Adiabatic Charge Pumping in Noncentrosymmetric Weyl Semimetals"
Hiroaki Ishizuka, Tomoya Hayata, Masahito Ueda, and Naoto Nagaosa
Phys. Rev. Lett. 117, 216601 (2016)
"Fermi gases: Anisotropic universality"
Masahito Ueda
Nature Physics (2016)
"Work Fluctuation-Dissipation Trade-Off in Heat Engines"
Ken Funo and Masahito Ueda
Phys. Rev. Lett. 115, 260601 (2015)
"Entanglement pre-thermalization in a one-dimensional Bose gas"
Eriko Kaminishi, Takashi Mori, Tatsuhiko N. Ikeda and Masahito Ueda
Nature Physics, 11, 1050-1056 (2015)
"Universal High-Momentum Asymptote and Thermodynamic Relations in a Spinless Fermi Gas with a Resonant p-Wave Interaction"
Shuhei M. Yoshida and Masahito Ueda
Phys. Rev. Lett., 115, 135303 (2015)
"Controlling and probing non-abelian emergent gauge potentials in spinor Bose-Fermi mixtures"
Nguyen Thanh Phuc, Gen Tatara, Yuki Kawaguchi and Masahito Ueda
Nature Communications 6, 8135 (2015)
"Diffraction-Unlimited Position Measurement of Ultracold Atoms in an Optical Lattice"
Yuto Ashida and Masahito Ueda
Phys. Rev. Lett. 115, 095301 (2015)
"Onset of a Limit Cycle and Universal Three-Body Parameter in Efimov Physics"
Yusuke Horinouchi and Masahito Ueda
Phys. Rev. Lett. 114, 025301 (2015)
"Quantum Mass Acquisition in Spinor Bose-Einstein Condensates"
Nguyen Thanh Phuc, Yuki Kawaguchi, and Masahito Ueda
Phys. Rev. Lett. 113, 230401 (2014)

RIKEN Quantum Condensate Research Team

Team Leader: Masahito Ueda

Publication

Articles

Selected Publications