无旋波近似下的二能级开放系统非马尔科夫动力学(英文)  

Non-Markovian dynamics for an open two-level system without rotating wave approximation

作　　者：徐甜甜[1] 唐宁[1] 郑艳萍[1] 曾浩生[1] 

机构地区：[1]湖南师范大学物理系教育部低维量子结构与调控重点实验室,湖南长沙410081

出　　处：《湖南文理学院学报（自然科学版）》2012年第2期12-20,共9页Journal of Hunan University of Arts and Science(Science and Technology)

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11075050);the National Fundamental Research Program of China(Grant No.2007CB925204);the Construct Program of the National Key Discipline

摘　　要：在无旋波近似下,研究了一个二能级系统与零温结构库的相互作用.当系统与环境为弱耦合时,推导出描述系统状态演化的主方程.解析与数值结果均表明,反旋转波项对系统的非马可夫动力学起着重要作用.同时也分析了最近提出的两种非马可夫度量之间的差别.The non-Markovianity for a two-level system interacting is studied with a zero-temperature structured environment without rotating wave approximation. In the limit of weak coupling between the system and the reservoir, the time-local non-Markovian master equation for the reduced state of the system is derived. Both the analytic and numerical results show that the counter-rotating wave terms play an important role for the non-Markovian dynamics of the system. And the difference of the two non-Markovian measures is proposed recently.

关 键 词：开放量子系统 旋波近似 非马尔科夫性 

分 类 号：O431.2[机械工程—光学工程]