The squeezing dynamics of two independent atoms by detuning in two non-Markovian environments  

作　　者：邹红梅 方卯发 杨百元 

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

出　　处：《Chinese Physics B》2013年第12期82-86,共5页中国物理B（英文版）

基　　金：Project supported by the Natural Science Foundation of Hunan Province,China(Grant No.09JJ5001);the Science and Technology Plan of Hunan Province,China(Grant No.2010FJ3148);the National Natural Science Foundation of China(Grant No.10374025)

摘　　要：The squeezing dynamics of two independent two-level atoms off-resonantly coupled to two non-Markovian reservoirs is studied by the time-convolutionless master-equation approach. We find that the squeezing of two atoms is dependent on both detuning and the non-Markovian effect. Our results show that, in the non-Markovian regime, the bigger the detuning and the stronger the non-Markovian effect are, the larger the strength of the squeezing is. And the squeezing of two atoms can be effectively protected for a long time when both the non-Markovian effect and detuning are present simultaneously. The physical mechanism is that the detuning not only can promote the feedback of information from the environment into the atomic system but also can greatly suppress the atomic decay in the non-Markovian regime.The squeezing dynamics of two independent two-level atoms off-resonantly coupled to two non-Markovian reservoirs is studied by the time-convolutionless master-equation approach. We find that the squeezing of two atoms is dependent on both detuning and the non-Markovian effect. Our results show that, in the non-Markovian regime, the bigger the detuning and the stronger the non-Markovian effect are, the larger the strength of the squeezing is. And the squeezing of two atoms can be effectively protected for a long time when both the non-Markovian effect and detuning are present simultaneously. The physical mechanism is that the detuning not only can promote the feedback of information from the environment into the atomic system but also can greatly suppress the atomic decay in the non-Markovian regime.

关 键 词：non-Markovian effect detuning squeezing two-level atom 

分 类 号：O562[理学—原子与分子物理]