Landau-Zener模型中纠缠演化及转移的研究  

Entanglement evolution and transfer in Landau-Zener model

作　　者：王海峰[1] 张英杰[2] 

机构地区：[1]日照职业技术学院,山东日照276826 [2]山东省激光偏光与信息技术重点实验室,曲阜师范大学物理系,山东曲阜273165

出　　处：《量子电子学报》2015年第6期691-698,共8页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金项目(11304179,11247240);山东省自然科学基金项目(ZR2012FQ024)资助课题

摘　　要：研究了受外场驱动的两个二能级系统分别与两个单模量子化光场相互作用模型中纠缠演化及转移问题。该工作主要对外场驱动的Landau-Zener模型进行了研究,采用旋转波近似的方法,通过数值计算详细分析了二能级系统初始状态、能级间的耦合常数以及驱动外场的参数对子系统间纠缠和转移特性的影响。结果表明,适当调节模型中的参数,可以使系统初始纠缠完全转移为光腔场间的纠缠,实现二能级系统与光场间的最大纠缠转移。The entanglement dynamical behaviors of two two-level systems, which respectively interact with asingle-mode quantum light-cavity field, were investigated. The Landau-Zener model driven by the classicalout-field was studied. By means of the transformed rotating-wave approximation （TRWA）, effects ofthe initial entanglement, coupling strength between two levels and parameter of the classical out-field onthe entanglement evolution and transfer of two two-level systems were analyzed by .numerical calculation.The results show that when choosing the appropriate condition, the initial entanglement can be perfectlytransferred into the light-cavity fields. So the biggest entanglement transfer between the two-level systemsand light-cavity fields can be realized easily.

关 键 词：量子光学 量子纠缠 共生纠缠 Landau—Zener模型 

分 类 号：O431.2[机械工程—光学工程]