arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv quant-ph/0412026quant-phcond-mat.mes-hall
收藏

二能级系统与随机经典场相互作用的动力学

Dynamics of Two-Level System Interacting with Random Classical Field

G. B. Lesovik, A. V. Lebedev, A. O. Imambekov

摘要:

利用泛函积分方法研究了双势阱中粒子与随机经典场相互作用的动力学问题。详细研究了粒子在两个井中定位的概率。计算了量子力学概率的某些场平均关联函数和最终态概率的分布函数(在存在随机场的情况下,最终态可以被认为是随机变量)。利用计算得到的双折射子讨论了终态对初态的依赖性。本文的主要结果之一是,虽然密度矩阵的非对角元素随时间消失,但系统中的粒子是不完全局域化的(不发生波包约化),在其中一个阱中发现粒子的概率分布函数在无限时间是常数。

英文摘要:

The dynamics of a particle interacting with random classical field in a two-well potential is studied by the functional integration method. The probability of particle localization in either of the wells is studied in detail. Certain field-averaged correlation functions for quantum-mechanical probabilities and the distribution function for the probabilities of final states (which can be considered as random variables in the presence of a random field) are calculated. The calculated correlators are used to discuss the dependence of the final state on the initial state. One of the main results of this work is that, although the off-diagonal elements of density matrix disappear with time, a particle in the system is localized incompletely (wave-packet reduction does not occur), and the distribution function for the probability of finding particle in one of the wells is a constant at infinite time.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑