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RIKEN Hakubi Research Teams Nonequilibrium Quantum Statistical Mechanics RIKEN Hakubi Research Team

RIKEN Hakubi Team Leader: Ryusuke Hamazaki (Ph.D.)

Research Summary

Ryusuke Hamazaki (Ph.D.)

Bridging macroscopic nonequilibrium phenomena and microscopic theory of (quantum) mechanics is presumably one of the most profound problems in physics. In particular, the past decade has witnessed a rapid development on our understanding of how isolated quantum systems relax to thermal equilibrium under unitary time evolution. We are now interested in understanding and controlling richer nonequilibrium dynamics emergent in isolated or dissipative quantum many-body systems. Through nonequilibrium science, I would also like to contribute to interdisciplinary researches, such as biology and information theory as well as condensed matter theory.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Engineering
  • Informatics
  • Interdisciplinary Science & Engineering
  • Physics
  • Mathematical physics/ Fundamental condensed matter physics

Keywords

  • Nonequilibrium science
  • Statistical mechanics
  • Quantum dynamics
  • Information theory
  • Quantum simulation

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.

  • 1. Maity, S., and Hamazaki, R.:
    "Kinetically constrained models constructed from dissipative quantum dynamics”
    Physical Review B 110 (1), 014301 (2024).
  • 2. Mochizuki, K., and Hamazaki, R.:
    "Absorption to fluctuating bunching states in nonunitary boson dynamics”
    Phys. Rev. Research 6, 013004 (2024).
  • 3. Fukushima, O., and Hamazaki, R.:
    "Violation of Eigenstate Thermalization Hypothesis in Quantum Field Theories with Higher-Form Symmetry”
    Phys. Rev. Lett. 131, 131602 (2023).
  • 4. Fujimoto, K., Hamazaki, R., and Kawaguchi, Y.:
    "Impact of Dissipation on Universal Fluctuation Dynamics in Open Quantum Systems”
    Phys. Rev. Lett. 129, 110403 (2022).
  • 5. Yoshinaga, A., Hakoshima, H., Imoto, T., Matsuzaki, Y., and Hamazaki, R.:
    "Emergence of Hilbert Space Fragmentation in Ising Models with a Weak Transverse Field”
    Phys. Rev. Lett. 129, 090602 (2022).
  • 6. Sugimoto, S., Hamazaki, R., Ueda, M.:
    " Eigenstate Thermalization in Long-Range Interacting Systems"
    Phys. Rev. Lett. 129, 030602 (2022).
  • 7. Hamazaki, R.:
    "Speed Limits for Macroscopic Transitions"
    PRX Quantum 3, 020319 (2022).
  • 8. Hamazaki, R.:
    "Exceptional dynamical quantum phase transitions in periodically driven systems”
    Nat. Commun. 12, 5108 (2021).
  • 9. Gong, Z., Yoshioka, N., Shibata, N., and Hamazaki, R.:
    "Universal Error Bound for Constrained Quantum Dynamics,"
    Phys. Rev. Lett. 124, 210606 (2020).
  • 10. *Hamazaki, R., Kawabata, K., and Ueda, M.:
    "Non-Hermitian Many-Body Localization"
    Phys. Rev. Lett. 123, 090603 (2019).

Recent Research Results

Annual research report

Lab Members

Principal investigator

Ryusuke Hamazaki
RIKEN Hakubi Team Leader

Core members

Yuya Chiba
Special Postdoctoral Researcher
Somnath Maity
Postdoctoral Researcher
Yuta Sekino
Postdoctoral Researcher
Hisanori Oshima
Junior Research Associate
Masae Takano
Assistant

Contact Information

RIKEN Main Research Building 623
2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Email: ryusuke.hamazaki@riken.jp

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