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Density matrix of chaotic quantum systems

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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.

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Authors and Affiliations

  1. Department of Physics, Zhejiang Normal University, Jinhua, 321004, P.R. China

    Xinxin Yang & Pei Wang

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  1. Xinxin Yang
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  2. Pei Wang
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Correspondence to Pei Wang.

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Yang, X., Wang, P. Density matrix of chaotic quantum systems. Eur. Phys. J. B 93, 198 (2020). https://doi.org/10.1140/epjb/e2020-10074-9

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  • DOI: https://doi.org/10.1140/epjb/e2020-10074-9

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