腔量子电动力学中运动原子量子关联的动力学  

Quantum Correlation Dynamics of Motive Atoms in Cavity Quantum Electrodynamics

作　　者：高德营[1,2] 夏云杰[1] 

机构地区：[1]曲阜师范大学物理工程学院,山东曲阜273165 [2]聊城大学东昌学院,山东聊城252000

出　　处：《激光与光电子学进展》2015年第8期289-295,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61178012;11204156);聊城大学东昌学院科研项目(2015LG009)

摘　　要：利用数值分析的方法,研究了两运动原子依次通过微腔时两原子的量子关联,讨论了两原子的初始态,腔场光子数及原子的运动对纠缠和量子失协的影响以及纠缠与量子失协的比较。结果表明:初始态可以改变纠缠和量子失谐的演化;腔场光子数的增加,可以使纠缠和量子失谐由周期性变化到非周期性变化,光子数不为零时,纠缠出现猝死现象,量子失谐保持非零;原子的运动可以使纠缠和量子失谐由非周期性演化变为周期性演化,使周期变短,并且发现原子运动的场模结构参数的增大可以提高纠缠和量子失谐的大小。在某些情况下,纠缠和量子失谐的演化规律具有一致性。Dynamics of quantum correlation of two atoms going through a cavity one after another are investigated by means of numerical analysis method. Effects of the initial atom states and the Fock state and the atomic movement on entanglement and quantum discord and a comparison of entanglement and quantum discord are analyzed. The results show that the initial atom state can change the time evolution of entanglement and quantum discord, the increase of Fock state number can make the entanglement and quantum discord from periodic evolution to nonperiodic evolution. The nozero of the number of Fock state can lead to entanglement sudden death and nonzero quantum discord. Atomic movement can make the entanglement and quantum discord from nonperiodic evolution to periodic evolution, and can make the period shorter and it is found that the increase of the field model structure parameter can increase the entanglement and quantum discord. In some cases, the evolution law of entanglement and quantum discord are nearly same.

关 键 词：量子光学 量子关联 共生纠缠 量子失谐 

分 类 号：O431[机械工程—光学工程]