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科技导报  2014 

基于李雅普诺夫控制的随机开放量子系统特性分析

DOI: 10.3981/j.issn.1000-7857.2014.22.001, PP. 15-22

Keywords: 随机开放量子系统,李雅普诺夫反馈控制,状态转移

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Abstract:

测量给确定性的开放量子系统带来了随机项,使随机开放量子系统本身产生一些马尔科夫和非马尔科夫开放量子系统所不具有的特性,这些特性给随机开放量子系统带来一些新的作用和影响。在目前有关随机开放量子系统李雅普诺夫控制理论研究的基础上,分别对无控制作用下随机开放量子系统的内部特性、开关控制和连续控制作用下系统的状态转移性能进行仿真研究。结果表明,在测量所带来的随机回馈项的作用下,在无控制的自由演化情况下,系统的状态最终随机地收敛到测量算符的某个本征态,其可能达到的本征态的个数与初态密度矩阵中对角线非零元素的个数相等;不论是开关控制还是连续控制,系统都能够从任意的初始纯态转移到期望的本征态,但相比于开关控制,连续控制的收敛速度更快,达到期望目标态所用时间更短。

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