耦合到马尔科夫和非马尔科夫环境下两相互作用原子系统纠缠动力学特性的研究  

The Study of Dynamics Properties of Entanglement of Two Interacting Atoms Coupled to Markovion and Non-Markovion Environment

作　　者：廖庆洪[1] 许娟[1] 鄢秋荣[1] 刘晔[1] 陈桉[1] 

机构地区：[1]南昌大学电子信息工程系,南昌330031

出　　处：《光子学报》2015年第9期11-16,共6页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.11247213;61368002;11304010;11264030;61168001);中国博士后科学基金(No.2013M531558);江西省博士后科研择优项目(No.2013KY33);江西省自然科学基金(No.20142BAB217001);江西省青年科学家(井冈之星)培养对象计划项目(No.20122BCB23002);江西省教育厅科技项目(Nos.GJJ13051;GJJ13057)资助~~

摘　　要：通过计算线性熵研究了两相互作用量子比特在马尔科夫和非马尔科夫环境下的纠缠随时间的演化特性,讨论了偶极相互作用强度和原子与库中心频率失谐量对纠缠的影响.结果表明线性熵随着偶极相互作用强度以及原子与库中心频率失谐量的增大而减小,在马尔科夫环境下线性熵在短时间内趋于稳态值,而在非马尔科夫环境下线性熵随时间的演化呈现振荡行为.The entanglement dynamics of two interacting qubits under the influence of Markovian environment and non-Markovian environment was examined by making use of the linear entropy. The effect of the strength of the dipole-dipole interaction and the detuning between the transition frequency of the atom and the center frequency of the reservoir on the time evolution of entanglement was discussed. It is shown that linear entropy decreases with the increase of the strength of the dipole-dipole interaction and the detuning between the transition frequency of the atom and the center frequency of the reservoir. Linear entropy tends to steady state within a short time in the Markovian environment, but in the non- Markovian environment linear entropy shows oscillatory behavior with the time evolution.

关 键 词：量子光学 量子信息 量子纠缠 线性熵 失谐量 马尔科夫环境 非马尔科夫环境 

分 类 号：O431.2[机械工程—光学工程]