Locality and heating in periodically driven, power-law-interacting systems

Minh C. Tran, Adam Ehrenberg, Andrew Y. Guo, Paraj Titum, Dmitry A. Abanin, Alexey V. Gorshkov

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

We study the heating time in periodically driven D-dimensional systems with interactions that decay with the distance r as a power law 1/rα. Using linear-response theory, we show that the heating time is exponentially long as a function of the drive frequency for α>D. For systems that may not obey linear-response theory, we use a more general Magnus-like expansion to show the existence of quasiconserved observables, which imply exponentially long heating time, for α>2D. We also generalize a number of recent state-of-the-art Lieb-Robinson bounds for power-law systems from two-body interactions to k-body interactions and thereby obtain a longer heating time than previously established in the literature. Additionally, we conjecture that the gap between the results from the linear-response theory and the Magnus-like expansion does not have physical implications, but is, rather, due to the lack of tight Lieb-Robinson bounds for power-law interactions. We show that the gap vanishes in the presence of a hypothetical, tight bound.

Original languageEnglish (US)
Article number052103
JournalPhysical Review A
Volume100
Issue number5
DOIs
StatePublished - Nov 6 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Fingerprint

Dive into the research topics of 'Locality and heating in periodically driven, power-law-interacting systems'. Together they form a unique fingerprint.

Cite this