驱动两能级原子和真空场相互作用系统中纠缠突然死亡的操控  

Control of Entanglement Sudden Death in a System Consisting of Driven Two-Level Atoms Interacting with Vacuum Fields

作　　者：廖庆洪[1] 胡靓[1] 胡婉如[1] 刘晔[1] 

机构地区：[1]南昌大学电子信息工程系,江西南昌330031

出　　处：《量子光学学报》2017年第1期21-30,共10页Journal of Quantum Optics

基　　金：国家自然科学基金(批准号:11247213;61368002);江西省杰出青年人才资助计划项目(批准号:20162BCB23009);江西省自然科学基金(批准号:20142BAB217001;20161BAB202046);江西省教育厅科技项目(批准号:GJJ13051)

摘　　要：利用并发度和线性熵作为纠缠度量研究了两个驱动两能级原子和真空场相互作用系统中的纠缠动力学特性,分析了经典驱动场频率、原子和经典场的耦合系数以及参数α对并发度和线性熵的影响。结果发现通过调控经典驱动场能够提高两原子之间和两原子与场之间的纠缠,实现两原子之间纠缠突然死亡现象的操控,理论上提供了一种调控纠缠的方式。The entanglement dynamics of a system consisting of two driven two-level atoms interacting with vacuum fields were studied by employing the concurrence and linear entropy.The effect of the frequency of the classical field,the coupling constant of the interactions of the atom with the classical driving field and the parameterαwere analyzed.The results indicate that the entanglement of the two atoms and the entanglement between the atoms and the cavity can be improved by adjusting the classical driving field.The control of the phenomenon of entanglement sudden death between two atoms can be achieved,which provides a theoretical way to control and manipulate the entanglement.

关 键 词：量子光学 量子纠缠 并发度 线性熵 纠缠突然死亡 经典驱动场 

分 类 号：O431.2[机械工程—光学工程]