English

Prethermalization in aperiodically kicked many-body dynamics

Statistical Mechanics 2023-06-29 v1 Quantum Gases Dynamical Systems Chaotic Dynamics Quantum Physics

Abstract

Driven many-body systems typically experience heating due to the lack of energy conservation. Heating may be suppressed for time-periodic drives, but little is known for less regular drive protocols. In this work, we investigate the heating dynamics in aperiodically kicked systems, specifically those driven by quasi-periodic Thue-Morse or a family of random sequences with nn-multipolar temporal correlations. We demonstrate that multiple heating channels can be eliminated even away from the high-frequency regime. The number of eliminated channels increases with multipolar order nn. We illustrate this in a classical kicked rotor chain where we find a long-lived prethermal regime. When the static Hamiltonian only involves the kinetic energy, the prethermal lifetime tt^* can strongly depend on the temporal correlations of the drive, with a power-law dependence on the kick strength tK2nt^*\sim K^{-2n}, for which we can account using a simple linearization argument.

Cite

@article{arxiv.2306.16144,
  title  = {Prethermalization in aperiodically kicked many-body dynamics},
  author = {Jin Yan and Roderich Moessner and Hongzheng Zhao},
  journal= {arXiv preprint arXiv:2306.16144},
  year   = {2023}
}
R2 v1 2026-06-28T11:16:43.881Z