大失谐J-C模型中腔耗散对量子态保真度的影响  

Influence of the cavity dissipation on fidelity of quantum state in the large detune J-C model

作　　者：王海军[1] 高云峰[2] 闫丽华[1] 

机构地区：[1]聊城大学物理科学与信息工程学院,聊城252059 [2]聊城大学传媒技术学院,聊城252059

出　　处：《原子与分子物理学报》2009年第5期882-886,共5页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(10574060)

摘　　要：利用全量子理论研究了存在腔耗散的大失谐Jaynes-Cumming(J-C)模型中量子态保真度,讨论了初始平均光子数一定的情况下腔的耗散系数对量子态保真度的影响,以及当腔的耗散一定的情况下初始光场的平均光子数对量子态保真度的影响.结果表明:腔的耗散和光场的初始平均光子数对原子和原子——光场系统的保真度的影响都很明显.The fidelities of quantum states of system in Jaynes-Cummings model considering the dissipation of cavity were studied by using the complete quantum theory. The influences of the cavity damping constant and the numerical value of initial mean photon number on the fidelities of quantum states was discussed. It was found that both of them affect the fidelities of atom and of atom-cavity system obviously.

关 键 词：量子态保真度 耗散常数 J—C模型 大失谐 

分 类 号：O431.2[机械工程—光学工程]