Detailed Balance of Thermalization Dynamics in Rydberg-Atom Quantum Simulators.

Area of Science:

• Quantum physics
• Statistical mechanics
• Complex systems

Background:

• Large complex systems often follow master equations for equilibrium dynamics.
• Understanding thermalization in isolated quantum systems is a key challenge.

Purpose of the Study:

• To investigate if thermalization of isolated many-body quantum states can be described by a master equation.
• To experimentally demonstrate detailed balance in quantum thermalization dynamics.

Main Methods:

• Utilized a quantum simulator with defect-free single-atom tweezers and Rydberg-atom interactions.
• Implemented sudden quench dynamics in quantum Ising-like models.
• Experimentally constructed a master equation by monitoring prequench state occupation probabilities and applying detailed balance.

Main Results:

• Observed that the saturation of local observables, a signature of thermalization, obeys a master equation.
• Demonstrated detailed balance in the thermalization dynamics of an isolated quantum system.
• Results align with theoretical predictions.

Conclusions:

• Thermalization in isolated quantum many-body systems can be accurately described by a master equation.
• Detailed balance can be achieved in quantum systems without coupling to external baths or invoking randomness.
• The study provides experimental evidence for fundamental principles of quantum statistical mechanics.