Preparation of steady-state entanglement via a laser-excited resonant interaction  

作　　者：程广玲 陈爱喜 耿珺 钟文学 邓黎 

机构地区：[1]Department of Applied Physics,East China Jiaotong University

出　　处：《Chinese Physics B》2012年第8期246-251,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 11047182,11165008,and 11065007);the Natural Science Foundation of Jiangxi Province,China (Grant Nos. 20114BAB202001 and 2010GQW0011);the Science Foundation of East China Jiaotong University,China (Grant Nos. 10JC03 and 10JC06)

摘　　要：In this paper we propose a scheme in which two-mode entanglement in a steady state is produced by using two lasers to resonantly drive a single four-level atom embedded inside a two-mode optical cavity. In this scheme, atomic coherence induced by a classical laser plays an important role in the process of preparing the entangled state. With the coupling of a strong control field, direct two-photon transition is generated and the relatively weak pump field induces the parametric interaction between two photons, which makes them entangle with each other. By numerical calculation, we find that the degree of entanglement depends strongly on the Rabi frequencies of the classical laser fields and the cavity losses.In this paper we propose a scheme in which two-mode entanglement in a steady state is produced by using two lasers to resonantly drive a single four-level atom embedded inside a two-mode optical cavity. In this scheme, atomic coherence induced by a classical laser plays an important role in the process of preparing the entangled state. With the coupling of a strong control field, direct two-photon transition is generated and the relatively weak pump field induces the parametric interaction between two photons, which makes them entangle with each other. By numerical calculation, we find that the degree of entanglement depends strongly on the Rabi frequencies of the classical laser fields and the cavity losses.

关 键 词：two-mode entanglement atomic coherence resonant interaction 

分 类 号：O431.2[机械工程—光学工程] O413.1[理学—光学]