热库环境中两二能级原子的量子态保真度  

Fidelity of quantum state of two two-level atoms in common thermal reservoir

作　　者：邹艳[1] 李永平[1] 

机构地区：[1]德州学院物理与电子信息学院,山东德州253023

出　　处：《量子电子学报》2014年第6期728-733,共6页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(11304031)资助课题

摘　　要：用全量子理论方法研究了环境的非马尔可夫效应、原子间的偶极相互作用以及原子的本征频率同腔模中心频率之间的失谐量对原子量子态保真度的影响。研究表明:两原子初态处于纠缠态时,在非马尔可夫机制下,原子的量子态保真度可以达到较大的稳定值,特别是原子的本征频率同腔模中心频率有一定失谐量时,原子间的偶极相互作用可以明显地改进原子的量子态保真度。无论热库环境有无马尔可夫效应,两原子初态处于分离态时,原子的保真度都不理想。The influence of the non-Maxkovian, dipole-dipole interaction of two atoms and the off-resonant on fidelity of two identity atoms＇ quantum state was investigated by means of full quantum theory. The results show that the fidelity of two identity atoms＇ quantum state is relatively higher when the two atoms are initially in the entangled state under the non-Markovian regime, especially in the off-resonant case, in which the fidelity considerably increases with interaction of the two atoms. If the two atoms are initially in the separable state, the fidelity of the quantum state is not optimal no matter the Markovian effect exists or not.

关 键 词：量子光学 量子态保真度 全量子理论 热库环境 非马尔可夫效应 偶极相互作用 

分 类 号：O431.2[机械工程—光学工程]