Tavis-Cummings模型中运动原子的量子关联动力学  

Quantum correlation dynamics of moving atoms in Tavis-Cummings model

作　　者：高德营[1] 王付军[1] 

机构地区：[1]聊城大学东昌学院,山东聊城252000

出　　处：《量子电子学报》2016年第2期208-214,共7页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金;61178012;山东省高等学校科技计划项目;J14LN87;聊城大学东昌学院科研项目;2015LG009~~

摘　　要：通过数值计算,研究了Tavis—Cummings模型中两运动原子与粒子场相互作用时两原子的量子关联。讨论了两原子初始纠缠度和腔场的光子数及原子的运动对两原子量子纠缠和量子失谐的影响。结果表明:初始量子纠缠度不同,两原子的量子纠缠和量子失谐的演化不同;光子数增加,两原子的量子纠缠出现猝死和恢复现象,而量子失谐保持非零,同时量子纠缠和量子失谐变化的更快;考虑原子的运动时,量子纠缠和量子失谐周期性演化,场模结构参数增大,量子纠缠和量子失谐的演化周期变小。通过演化曲线发现,量子纠缠和量子失谐的演化具有相似性。By numerical calculation,the quantum correlation dynamics of two moving atoms was investigated in Tavis-Cummings model in which the two moving atoms interact with the particle field.The effects of the initial entanglement of the two atoms and the number of photon in the particle field and atomic movement on entanglement and quantum discord were analyzed.The results show that initial entanglement is different,and the time evolution of atoms' quantum entanglement and quantum discord is different.With the increase of the number of photon,phenomenon of sudden death and birth of quantum entanglement between two atoms occurs,while quantum discord keeps nonzero and the time evolution of quantum entanglement and quantum discord becomes faster.Atomic movement can make quantum entanglement and quantum discord has a periodic evolution.The increase of the field model structure parameter can make the period of quantum entanglement and quantum discord be shorter.It is found that quantum entanglement and quantum discord are similar in evolution.

关 键 词：量子光学 量子失谐 量子关联 

分 类 号：O413.1[理学—理论物理]