Comparison between non-Markovian dynamics with and without rotating wave approximation  

作　　者：唐宁 徐甜甜 曾浩生 

机构地区：[1]Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education,and Department of Physics, Hunan Normal University

出　　处：《Chinese Physics B》2013年第3期129-136,共8页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 11275064 and 11075050);the National Basic Research Program of China(Grant No. 2007CB925204);the Construct Program of the National Key Discipline,China

摘　　要：In the limit of weak coupling between a system and its reservoir,we derive the time-convolutionless（TCL） nonMarkovian master equation for a two-level system interacting with a zero-temperature structured environment with no rotating wave approximation（NRWA）.By comparing the dynamics with RWA,we demonstrate the impact of RWA on the system dynamics,as well as the effects of non-Markovianity on the preservation of atomic coherence,squeezing,and entanglement.In the limit of weak coupling between a system and its reservoir,we derive the time-convolutionless（TCL） nonMarkovian master equation for a two-level system interacting with a zero-temperature structured environment with no rotating wave approximation（NRWA）.By comparing the dynamics with RWA,we demonstrate the impact of RWA on the system dynamics,as well as the effects of non-Markovianity on the preservation of atomic coherence,squeezing,and entanglement.

关 键 词：open quantum system rotating wave approximation non-Markovianity 

分 类 号：O431.2[机械工程—光学工程] N941.3[理学—光学]