Irreversible dynamics in quantum many-body systems

Article

关键词: STATISTICAL-MECHANICS;    POLARIZATION ECHOES;    PHASE-TRANSITION;    THERMALIZATION;    ATTENUATION;    CHAOS;   

DOI  :  10.1103/PhysRevB.98.180301

来源: SCIE

【 摘 要 】

Irreversibility, despite being a necessary condition for thermalization, still lacks a sound understanding in the context of isolated quantum many-body systems. In this Rapid Communication we approach this question by studying the behavior of generic many-body systems under imperfect effective time reversal, where the imperfection is introduced as a perturbation of the many-body state at the point of time reversal. Based on numerical simulations of the full quantum dynamics we demonstrate that observable echoes occurring in this setting decay exponentially with a rate that is independent of the perturbation; hence, the sensitivity to perturbations is intrinsic to the system, meaning that the dynamics is effectively irreversible.

【 授权许可】

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