运动原子与双光子相互作用模型中的纠缠与热纠缠  

Entanglement and Thermal Entanglement in Two-photon Model with Atomic Motion

作　　者：张多[1] 李群莲[1] 

机构地区：[1]武汉工业学院数理系,湖北武汉430023

出　　处：《量子光学学报》2008年第4期384-387,共4页Journal of Quantum Optics

基　　金：武汉工业学院校立科研项目(07Q23)

摘　　要：利用共生纠缠度,研究了运动原子与单模腔场发生双光子相互作用模型的纠缠与热纠缠现象。结果表明:初始光子数和腔模半波数对纠缠度和热纠缠度的演化周期有一定影响,而原子与腔场的耦合系数不会改变纠缠度的演化周期,但耦合系数减小时,系统处于最大纠缠态的时间减少;在临界温度之下,环境温度增加会使系统纠缠度变小。We investigate the entanglement and thermal entanglement between moving atom and Single-mode cavity in two-photon model by means of concurrence. It is shown that initial photons number and field-mode structure parameter affect entanglement and thermal entanglement in a certain degree. The evolution period of thermal entanglement doesn＇t change when the coupling constant between atom and cavity field has different values, while, the time of the system in maximum entanglement decreases when coupling constant reduces. Thermal entanglement decreases with the increase of system temperature when the temperature is under critical temperature.

关 键 词：原子运动 纠缠 热纠缠 共生纠缠度 

分 类 号：O431[机械工程—光学工程]