Density matrix of chaotic quantum systems

Xinxin Yang and Pei Wang ()
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Xinxin Yang: Zhejiang Normal University
Pei Wang: Zhejiang Normal University

The European Physical Journal B: Condensed Matter and Complex Systems, 2020, vol. 93, issue 10, 1-6

Abstract: Abstract The nonequilibrium dynamics in chaotic quantum systems denies a fully understanding up to now, even if thermalization in the long-time asymptotic state has been explained by the eigenstate thermalization hypothesis which assumes a universal form of the observable matrix elements in the eigenbasis of Hamiltonian. It was recently proposed that the density matrix elements have also a universal form, which can be used to understand the nonequilibrium dynamics at the whole time scale, from the transient regime to the long-time steady limit. In this paper, we numerically test these assumptions for density matrix in the models of spins. Graphical abstract

Keywords: Statistical; and; Nonlinear; Physics (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1140/epjb/e2020-10074-9

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