RATES OF QUANTUM DECOHERENCE IN REGULAR AND CHAOTIC SYSTEMS

被引：31

作者：

TAMESHTIT, A ^{[1
]}

SIPE, JE ^{[1
]}

机构：

[1] UNIV TORONTO, ONTARIO LASER & LIGHTWAVE RES CTR, TORONTO M5S 1A7, ONTARIO, CANADA

来源：

PHYSICAL REVIEW A | 1993年 / 47卷 / 03期

关键词：

D O I：

10.1103/PhysRevA.47.1697

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We initiate a study of rates of quantum decoherence in regular and chaotic systems. The system of interest investigated is quite general and the interaction with the surroundings is via a particular quantum-nondemolition coupling. We find that the averaged coherence, as measured by Trrho2(t), decays faster asymptotically in chaotic than in regular systems; this is a direct result of the repulsion of energy levels in the former case. We also investigate the phenomenon of self-averaging, providing general conditions that ensure that averaged and unaveraged quantities, such as Trrho2(t), coincide. We find good agreement between our analytic results and those obtained numerically for the circle and stadium billiards.

引用

页码：1697 / 1703

页数：7

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