V-型三能级原子与双模腔场模型中的量子纠缠交换方案  

Scheme for Quantum Entanglement Swapping in V-Type Three-Level Atom and Two-Mode Cavity Field Model

作　　者：张蕾[1] Zhang Lei(Huaqing College,Xi’an University of Architecture and Technology,Xi’an,Shaanxi 710043,China)

机构地区：[1]西安建筑科技大学华清学院,陕西西安710043

出　　处：《激光与光电子学进展》2021年第19期371-375,共5页Laser & Optoelectronics Progress

基　　金：陕西省教育厅科研项目(18JK025)。

摘　　要：基于纠缠交换,提出了一种利用V-型三能级纠缠原子系统与纠缠双模腔场部分相互作用产生最大纠缠态的方案。在该方案中,只需测量单个原子态而无需联合测量,就能实现初始没有任何相互作用的原子与腔场间的纠缠。在原子与腔相互作用过程中,腔只被虚拟激发且腔和原子之间无能量交换,因此大大放宽了系统对腔品质的要求。结果表明,当原子与腔场之间的相互作用时间为1.4675×10^(-5)s时,可以得到保真度为92.8%的最大纠缠态。此外,还对该方案的可行性进行了讨论。Based on entanglement swapping,a scheme to generate the maximum entangled state by means of an entangled V-type three-level atomic system partially interacting with an entangled two-mode cavity field is proposed.In the scheme,the entanglement between the atom and the cavity field without any initial interaction can be achieved by measuring only a single atomic state without joint measurement.In the process of atom-cavity interaction,the cavity is only virtually excited and there is no energy exchange between the atom and the cavity,so the requirements of system on cavity quality are greatly relaxed.The results show that when the interaction time between the atom and the cavity field is 1.4675×10^(-5)s,the maximum entangled state with fidelity of 92.8%can be obtained.Moreover,the feasibility of the scheme is also discussed.

关 键 词：量子光学 量子纠缠 大失谐 纠缠交换 保真度 

分 类 号：O431.2[机械工程—光学工程]