摘要
利用全量子理论,研究了M个二能级原子分别与M个多模光场依赖于强度耦合的相互作用过程.结果表明,控制原子穿越腔场的时间,能够实现量子纠缠信息的传递与保持,即t1=π/(2λ)时,原子和腔场中的纠缠态可以相互交换,其结果利用数值计算原子纠缠度得以证明;当t2=π/λ时,原子和腔场中的纠缠态可以各自保持.
Using the complete quantum theory,the process of M two-level atoms interacting with M multi-mode light fields with intensity-dependent coupling is studied.It is found that quantum entanglement information can be transferred back and forth or be preserved between the cavity fields and atoms under certain time conditions.The entanglement states of the atoms or the cavities can be transferred when t=π/（2λ）.The results are verified by numerically computing the entanglement degree.And it was shown that the entanglement states of the atoms or the cavities can be preserved when t=π/λ.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第11期6420-6426,共7页
Acta Physica Sinica
基金
陕西省自然科学基金(批准号:2001S104
2004A19)
渭南师范学院重点科研基金(批准号:06YKF012)资助的课题.~~
关键词
量子信息学
多模光场
二能级原子
纠缠交换
quantum informatics,multi-mode light field,two-level atom,entanglement transfer
