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Area of Science:

  • Atomic, Molecular, and Optical (AMO) Physics
  • Quantum Statistical Mechanics
  • Condensed Matter Theory

Background:

  • Understanding quantum thermalization in complex systems is a fundamental challenge.
  • Rydberg atom arrays offer a controllable platform for studying many-body quantum phenomena.
  • Standard mean-field theories often fail to capture crucial nonlinearities and fluctuations.

Purpose of the Study:

  • To investigate the nonequilibrium dynamics of two-dimensional Rydberg atom arrays coupled to an optical cavity.
  • To explore phenomena beyond mean-field theory, including nonlinearities and fluctuations.
  • To identify and characterize novel thermalization regimes in strongly correlated quantum systems.

Main Methods:

  • Utilized nonequilibrium diagrammatic techniques to model system dynamics.
  • Analyzed the interplay between short-range Rydberg interactions and long-range photon-mediated interactions.
  • Investigated the effective temperatures of matter and light components.

Main Results:

  • Discovered a novel prethermalization regime driven by competing interactions.
  • Observed distinct and sometimes opposite effective temperatures for matter and light.
  • Demonstrated a regime analogous to prethermalization in particle physics.

Conclusions:

  • Strongly correlated AMO platforms are powerful tools for fundamental statistical mechanics research.
  • The study provides new insights into quantum thermalization in higher-dimensional systems.
  • The observed prethermalization regime opens avenues for exploring nonequilibrium quantum phenomena.