Signatures of chaos and thermalization in the dynamics of many-body quantum systems.

Date

2019-03

Authors

Santos, Lea F.
Torres-Herrera, Eduardo Jonathan

Journal Title

Journal ISSN

Volume Title

Publisher

Springer Berlin Heidelberg

Abstract

We extend the results of two of our papers [Phys. Rev. A 94, 041603R (2016) and Phys. Rev. B 97, 060303R (2018)] that touch upon the intimately connected topics of quantum chaos and thermalization. In the first, we argued that when the initial state of isolated lattice many-body quantum systems is chaotic, the power-law decay of the survival probability is caused by the bounds in the spectrum, which thus anticipates thermalization. In the current work, we provide stronger numerical support for the onset of these algebraic behaviors. In the second paper, we demonstrated that the correlation hole, which is a direct signature of quantum chaos revealed by the evolution of the survival probability at times beyond the power-law decay, appears also for other observables. In the present work, we investigate the correlation hole in the chaotic regime and in the vicinity to a many-body localized phase for the spin density imbalance, which is an observable studied experimentally.

Description

Research article, peer reviewed. Open Access.

Keywords

quantum chaos, thermalization, many-body quantum system

Citation

Santos, Lea F. Eduardo Jonathan Torres-Herrera. (2019). Signatures of chaos and thermalization in the dynamics of many-body quantum systems. European Physical Journal Special Topics 227(15): 1897-1910.