摘要
利用共生纠缠度研究了含原子运动的多光子Jaynes-Cummings模型中原子与腔在有限温度下的热纠缠态.结果表明,存在一个临界温度,当环境温度高于该临界温度时,原子和腔场之间将没有任何纠缠,临界温度随耦合系数及原子跃迁时吸收和发射的光子数的增加而增高.并且随温度的升高,共生纠缠度减小.对于典型的实验数据,临界温度大约在10-5K数量级.
Concurrence was adopted to investigate the thermal entanglement produced by resonant multiphoton Jaynes-Cummings model with atomic motion. The results showed the presence of a critical temperature, above which thermal entanglement of atom and cavity field mode vanished. The critical temperature increased with the increase in coupling constant and the number of photons absorbed or emitted per atomic transition. The concurrence decreased with increasing temperature. For typical experimental data, the critical temperature was around the order of 10-5 K.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第5期18-22,共5页
Journal of Southwest University(Natural Science Edition)
基金
国家自然科学基金资助项目(10205019
10475098)
中国科学院百人计划资助项目(200668)
西南大学博士基金资助项目(SWNU2005028)
