系统-环境初始关联对纠缠动力学的影响  

The Effect of System-environment Initial Correlation on the Dynamics of Concurrence

作　　者：闫丽[1] 夏云杰[1] 

机构地区：[1]曲阜师范大学物理系,山东省激光偏光与信息技术重点实验室,山东曲阜273165

出　　处：《量子光学学报》2014年第1期16-22,共7页Journal of Quantum Optics

基　　金：国家自然科学基金项目资助课题(61178012)

摘　　要：研究了存在偶偶相互作用的两个二能级原子与共同单洛伦兹热库相互作用模型下的两体间的纠缠动力学行为。主要考虑了原子系统与环境存在初始关联时,两原子间的偶偶相互作用对纠缠动力学的影响,可以发现:偶偶相互作用一定时,马尔科夫环境下初始关联使原子与热库间的纠缠比原子间的纠缠衰减得慢,非马尔科夫环境下初始关联使原子间的振荡减弱;另外在马尔科夫热库中,随着偶偶相互作用的增强,两原子纠缠可以得到提升,而在非马尔科夫热库中,随着偶偶相互作用的增强,原子间及原子与热库间最终保持较大纠缠值。The entanglement dynamical behaviors between two bodies were investigated in the model of two two-level atoms interacting with a common single Lorentz reservoir ,with the existence of dipole-dipole interaction .When atom system and environment existed initial correlation ,the effect of the dipole-dipole interaction of two atoms on the entanglement dynamics were considered .It was shown that ,when the dipole-dipole interaction was certain ,the initial correlation made the entanglement of atom-reservoir decay more slowly than that of atoms in Markovian environment .But in Non-Markovian environment the initial correlation decreased the oscillation of atoms .Furthermore ,in Markovian reservoir ,the entanglement between atoms increased with the strength of dipole-dipole interaction increasing ,but in non-Markovian environment ,the Entanglement of atoms and atom-reservoir remained larger with the strength of dipole-dipole interaction increasing .

关 键 词：量子纠缠 非马尔科夫 初始关联 

分 类 号：O431[机械工程—光学工程]