Zhenyu Xu (Author), Aurelia Chenu (Author), Tomaž Prosen (Author), Adolfo del Campo (Author)

Abstract

Quantum chaos imposes universal spectral signatures that govern the thermofield dynamics of a many-body system in isolation. The fidelity between the initial and time-evolving thermofield double states exhibits as a function of time a decay, dip, ramp, and plateau. Sources of decoherence give rise to a nonunitary evolution and result in information loss. Energy dephasing gradually suppresses quantum noise fluctuations and the dip associated with spectral correlations. Decoherence further delays the appearance of the dip and shortens the span of the linear ramp associated with chaotic behavior. The interplay between signatures of quantum chaos and information loss is determined by the competition among the decoherence, dip, and plateau characteristic times, as demonstrated in the stochastic Sachdev-Ye-Kitaev model.

Keywords

kvantna fizika;kvantni kaos;quantum physics;quantum chaos;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FMF - Faculty of Mathematics and Physics
UDC: 530.145
COBISS: 76226307 Link will open in a new window
ISSN: 2469-9950
Views: 175
Downloads: 75
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Other data

Secondary language: Slovenian
Secondary keywords: kvantna fizika;kvantni kaos;
Pages: str. 064309-1-064309-11
Volume: ǂVol. ǂ103
Issue: ǂiss. ǂ6
Chronology: 2021
DOI: 10.1103/PhysRevB.103.064309
ID: 13398421