两能级原子与单模场非共振耦合系统中的热纠缠现象  

Thermal Entanglement of A Two-level Atom Coupled to Single-mode Cavity in Nonresonant System

作　　者：张多[1] 

机构地区：[1]武汉工业学院数理科学系,湖北武汉430023

出　　处：《武汉工业学院学报》2008年第1期105-107,共3页Journal of Wuhan Polytechnic University

摘　　要：利用共生纠缠度,讨论了非旋波近似下非共振的二能级原子与单光子腔肠的热纠缠现象。结果表明:失谐量并不影响系统热纠缠度的演化;该系统存在一临界温度,当系统温度高于这一临界温度时,原子与腔场的纠缠特性将消失;同时系统耦合系数对系统纠缠度也有较大的影响。The thermal entanglement of a two-level atom coupled to Single-mode cavity with the effect of virtualphoton field in nonresonant system by means of concurrence is investigated. It is shown that detuning frequency has no effect on the evolution of thermal entanglement in the system. There exists a critical temperature, above which thermal entanglement of atom and field mode vanishes. At the same time, the coupling constants of system have great effect on thermal entanglement of atom and field.

关 键 词：热纠缠 失谐频率 共生纠缠度 系统温度 

分 类 号：O431[机械工程—光学工程]