多光子两能级系统量子信息保真度演化规律的研究  

Investigation of the evolution of fidelity of quantum information in many-photon two-level system

作　　者：杨文星[1] 李家华[1] 

机构地区：[1]华中科技大学物理系,湖北武汉430074

出　　处：《量子电子学报》2004年第6期745-750,共6页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(90103026)国家自然科学基金优秀创新群体(10121503)

摘　　要：研究了初始处于纠缠态的双原子与相干光场的相互作用。并给出了有任意光子跃迁的J-C模型中量子信息保真度的表达式。还着重比较了单光子跃迁和双光子跃迁J-C模型中不同的失谐量和初始平均光子数对系统,原子和光场的量子信息保真度演化的影响。The evolution of fidelity of quantum information in pair atoms of entanglement state interacting with coherent light field was investigated. The expression of fidelity of quantum information in J-C model with many-photon transition was written out. Time-evolution of fidelity of quantum information in J-C model with one-photon transition or two-photon transition was compared.

关 键 词：量子信息 J—C模型 纠缠态原子 保真度 

分 类 号：O431.2[机械工程—光学工程]