Typical pure states and nonequilibrium processes in quantum many-body systems

Takaaki Monnai, Ayumu Sugita

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Abstract

We show that it is possible to calculate equilibrium expectation values of many-body correlated quantities such as the characteristic functions and probability distributions with the use of only a single typical pure state. It also means that we can apply the pure state approach to Heisenberg operators and their spectral fluctuation, and hence to nonequilibrium processes starting from equilibrium. In particular, we can accurately analyze the full statistics of entropy production in nonequilibrium mesoscopic systems. In this way, we can access the full information on higher-order fluctuations in the large deviation regime far from equilibrium.

Original languageEnglish
Article number094001
JournalJournal of the Physical Society of Japan
Volume83
Issue number9
DOIs
Publication statusPublished - 2014 Sep 15

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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