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Area of Science:

  • Quantum physics
  • Thermodynamics
  • Condensed matter physics

Background:

  • Open quantum systems typically decay to thermal equilibrium following the master equation and detailed balance.
  • Systems deviating from weak coupling, particularly with magnetic fields breaking microreversibility, violate detailed balance but can still achieve thermalization.

Purpose of the Study:

  • To investigate the thermalization dynamics of open quantum systems that violate detailed balance.
  • To explore the impact of temperature on these dynamics, including the emergence of novel phenomena.

Main Methods:

  • Theoretical study of open quantum systems dynamics.
  • Analysis of systems violating detailed balance, potentially in the presence of magnetic fields.
  • Examination of thermalization transitions and population dynamics at varying temperatures.

Main Results:

  • A temperature increase reveals new exceptional points, signaling abrupt changes in thermalization.
  • Higher temperatures induce oscillations in energy level populations, even without quantum coherence.
  • The violation of detailed balance establishes a characteristic energy scale for high-temperature oscillatory behavior.

Conclusions:

  • Detailed balance violation in open quantum systems leads to rich, temperature-dependent thermalization dynamics.
  • Exceptional points and population oscillations represent significant deviations from standard thermalization predictions.
  • The study highlights unique quantum phenomena arising from non-equilibrium conditions and broken symmetries.