Quantum work statistics, Loschmidt echo and information scrambling
Quantum Physics
2018-08-24 v2 Statistical Mechanics
High Energy Physics - Theory
Abstract
A universal relation is established between the quantum work probability distribution of an isolated driven quantum system and the Loschmidt echo dynamics of a two-mode squeezed state. When the initial density matrix is canonical, the Loschmidt echo of the purified double thermofield state provides a direct measure of information scrambling and can be related to the analytic continuation of the partition function. Information scrambling is then described by the quantum work statistics associated with the time-reversal operation on a single copy, associated with the sudden negation of the system Hamiltonian.
Cite
@article{arxiv.1711.01277,
title = {Quantum work statistics, Loschmidt echo and information scrambling},
author = {Aurélia Chenu and Iñigo L. Egusquiza and Javier Molina-Vilaplana and Adolfo del Campo},
journal= {arXiv preprint arXiv:1711.01277},
year = {2018}
}
Comments
6 pages, 1 figure, published version