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RIKEN Center for Emergent Matter Science Quantum Condensate Research Team

Team Leader: Masahito Ueda (Ph.D.)

Research Summary

Masahito  Ueda(Ph.D.)

Many systems are known to undergo Bose-Einstein condensation at low temperatures such as ultracold atomic gases, superconductors and liquid helium. In these systems, a macroscopic number of atoms occupy the same single-particle state, thereby amplifying quantum-mechanical microscopic properties to a macroscopic level. These quantum condensates are important not only from a fundamental physics point of view but also for applications to quantum information and quantum simulators. The quantum condensate research team aims to promote these researches theoretically and experimentally.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Engineering

Keywords

  • Ultracold atomic gases
  • Quantum information, Measurement, and Control
  • Information thermodynamics
  • Bose-Einstein condensation

Selected Publications

  • 1. Z Gong, R Hamazaki, M Ueda.:
    "Discrete Time-Crystalline Order in Cavity and Circuit QED Systems"
    Physical Review Letters 120 (4), 040404 (2018).
  • 2. Z Gong, Y Ashida, K Kawabata, K Takasan, S Higashikawa, M Ueda.:
    "Topological Phases of Non-Hermitian Systems"
    Physical Review X 8, 031079 (2018) [selected as PRX-Ten Years After].
  • 3. K Kawabata, S Higashikawa, Z Gong, Y Ashida, M Ueda.:
    "Topological unification of time-reversal and particle-hole symmetries in non-Hermitian physics"
    Nature Communications 10 (1), 1-7 (2019).
  • 4. K Kawabata, K Shiozaki, M Ueda, and M Sato.:
    "Symmetry and topology in non-Hermitian physics"
    Physical Review X 9, 041015 (2019) [selected as PRX-Ten Years After].
  • 5. M. Ueda.:
    "Quantum equilibration, thermalization and prethermalization in ultracold atoms"
    Nature Review Physics 2 (12) 669-681 (2020).
  • 6. N Matsumoto, K Kawabata, Y Ashida, S Furukawa, and M Ueda.:
    "Continuous phase transition without gap closing in non-Hermitian quantum many-body systems"
    Physical Review Letters 125 (26), 260601 (2020).
  • 7. S. Sugimoto, R. Hamazaki, and M. Ueda.:
    "Test of the eigenstate thermalization hypothesis based on local random matrix theory"
    Physical Review Letters 126 (12), 120602 (2021).
  • 8. Y Ashida, Z Gong, and M Ueda.:
    "Non-hermitian physics"
    Advances in Physics 69 (3), 249-435 (2021).
  • 9. S Sugimoto, R Hamazaki, and M Ueda.:
    "Eigenstate thermalization in long-range interacting systems"
    Physical Review Letters 129 (3), 030602 (2022).
  • 10. L Dabelow, and M Ueda.:
    "Three learning stages and accuracy-efficiency tradeoff of restricted Boltzmann machines"
    Nature communications 13 (1), 1-11 (2022) [selected as Editors’ Highlight].

Recent Research Results

Related Links

Lab Members

Principal investigator

Masahito Ueda
Team Leader

Core members

Naoto Tsuji
Visiting Scientist
Xingyuan Zhang
Visiting Scientist

Contact Information

2-1 Hirosawa, Wako, Saitama
351-0198 Japan

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