Thermalization and Heating Dynamics in Open Generic Many-Body Systems

Yuto Ashida, Keiji Saitou, Masahito Ueda

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The last decade has witnessed remarkable progress in our understanding of thermalization in isolated quantum systems. Combining the eigenstate thermalization hypothesis with quantum measurement theory, we extend the framework of quantum thermalization to open many-body systems. A generic many-body system subject to continuous observation is shown to thermalize at a single trajectory level. We show that the nonunitary nature of quantum measurement causes several unique thermalization mechanisms that are unseen in isolated systems. We present numerical evidence for our findings by applying our theory to specific models that can be experimentally realized in atom-cavity systems and with quantum gas microscopy. Our theory provides a general method to determine an effective temperature of quantum many-body systems subject to the Lindblad master equation and thus should be applicable to noisy dynamics or dissipative systems coupled to nonthermal Markovian environments as well as continuously monitored systems. Our work provides yet another insight into why thermodynamics emerges so universally.

Original languageEnglish
Article number170402
JournalPhysical Review Letters
Volume121
Issue number17
DOIs
Publication statusPublished - 2018 Oct 24

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Thermalization and Heating Dynamics in Open Generic Many-Body Systems'. Together they form a unique fingerprint.

  • Cite this