Relaxation to equilibrium of the expectation values in macroscopic quantum systems

被引：6
作者：
Monnai, Takaaki [1 ]
机构：
[1] Osaka City Univ, Dept Appl Phys, Sumiyoshi Ku, Osaka 5588585, Japan
来源：
PHYSICAL REVIEW E | 2011年 / 84卷 / 01期
关键词：
D O I：
10.1103/PhysRevE.84.011126
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
A quantum mechanical explanation of the relaxation to equilibrium is shown for macroscopic systems for nonintegrable cases and numerically verified. The macroscopic system is initially in an equilibrium state, subsequently externally perturbed during a finite time, and then isolated for a sufficiently long time. We show a quantitative explanation that the initial microcanonical state typically reaches a state whose expectation values are well approximated by the average over another microcanonical ensemble.
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页数：4
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