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Updated: Dec 25, 2025

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Periodically Driven Sachdev-Ye-Kitaev Models.

Clemens Kuhlenkamp¹, Michael Knap¹

¹Department of Physics and Institute for Advanced Study, Technical University of Munich, 85748 Garching, Germany and Munich Center for Quantum Science and Technology (MCQST), Schellingstr. 4, D-80799 München, Germany.

Physical Review Letters

|March 29, 2020

Summary

This summary is machine-generated.

Periodically driven quantum matter exhibits distinct heating dynamics. Non-Fermi liquids thermalize rapidly, while Fermi liquids show slower heating due to quasiparticles, impacting dynamical phase robustness.

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Area of Science:

Quantum Dynamics
Condensed Matter Physics
Statistical Mechanics

Background:

Periodically driven quantum systems can host exotic dynamical phases.
Understanding the ubiquity and robustness of these phases requires studying thermalization dynamics.
The generalized Sachdev-Ye-Kitaev (SYK) model provides a platform to study crossovers between different quantum liquid behaviors.

Purpose of the Study:

Investigate the thermalization dynamics in a periodically driven generalized SYK model.
Determine the distinct heating regimes in this system.
Analyze the role of quasiparticles in obstructing thermalization.

Main Methods:

Developed an exact field theoretic approach.
Analyzed heating dynamics in a generalized SYK model.
Studied crossover from Fermi liquid (FL) to non-Fermi liquid (NFL) behavior.

Main Results:

Identified two distinct heating dynamics regimes.
Observed exponential heating and rapid thermalization in the NFL regime.
Found that quasiparticles in the FL regime obstruct heating and thermalization over longer timescales.

Conclusions:

The presence of quasiparticles significantly affects thermalization timescales in driven quantum systems.
Dynamical phases in driven quantum matter may exhibit varying robustness depending on their underlying quasiparticle structure.
Prethermal high-frequency dynamics and experimental realizations of nonequilibrium SYK physics warrant further investigation.