摘要
利用全量子理论,精确求解了非旋波近似下多个二能级原子与单模光场构成的联合系统态矢量的演化规律,讨论了旋波近似下和非旋波近似下纠缠态在光场与原子之间的转化过程。结果表明:旋波近似下,原子纠缠态与光场纠缠态可以方便的交换传递或保持。非旋波近似下,虚光场效应对纠缠态在腔场与原子之间相互转化的过程有明显的影响:光场纠缠信息传递给原子后腔场未能恢复到真空态;伴随着纠缠态的转化和保持过程,相位有所改变并产生了多项干扰。
By using the complete quantum theory, the evolution law of the state voter in the joint system consisting of multi-two-level-atom and multi-single-mode-field without Rotating-Wave Approximation （RWA） is exactly calculated. The process of entangled state transformation between the cavities and the atoms with RWA and without RWA are all discussed. It is found that the atomic entanglement state and the cavity-field entanglement state can be simply preserved or exchanged each other with RWA. There is obvious the influence virtual photon field effect on the process of the transfer without RWA, that is, after the light entangled information transfer into the atoms the field vacuum state not can be restored. The phases are changed and many disturbance items are appended while the process of transfer and preservation.
出处
《四川大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第1期134-138,共5页
Journal of Sichuan University(Natural Science Edition)
基金
陕西省自然科学基金(SJ08A25)
陕西省教育厅专项科研基金(08JK286)
渭南师院重点科研基金(08YKF014)
关键词
量子光学
非旋波近似
量子纠缠信息
纠缠交换传递
纠缠保持
quantum optics, without rotating-wave approximation, quantum entangled information, entanglement transfer, entanglement preservation
