双模纠缠相干光场与Bell态原子相互作用系统的光场压缩效应  

Light squeezing in the system of the two-mode entangled coherent field interacting with atoms in Bell states

作　　者：林继成[1] 郑小虎[2] 曹卓良[2] 

机构地区：[1]南京晓庄学院物理系,南京210017 [2]安徽大学物理与材料科学学院,合肥230039

出　　处：《原子与分子物理学报》2007年第4期767-774,共8页Journal of Atomic and Molecular Physics

基　　金：安徽省自然科学基金(03042401);安徽省教育厅重点项目基金(2004kj005zd)

摘　　要：运用求解Schrdinger方程和数值计算方法,研究了处于Bell态的两个全同二能级纠缠原子与双模纠缠相干光场相互作用系统的光场压缩特性,分析了双模纠缠相干光场的纠缠程度、双模纠缠相干光场的初始平均光子数对光场压缩性质的影响,以及两纠缠原子的相互作用强度对光场压缩性质的影响.结果表明:若初始时刻原子处在Bell态|β11〉,则不出现光场的压缩效应,而处在另外三种Bell态时,在一定的条件下均可呈现光场的压缩效应.光场压缩效应不仅与初始光场的平均光子数以及原子的初态有关而且与双模纠缠相干光场的纠缠程度有关,但与两纠缠原子的相互作用强度的大小没有明显的关系.The light squeezing effects in the system of two identical two-level atoms in the Bell state interacting with the two-mode entangled coherent states field are investigated by means of Schr＇odinger equation solution and numerical calculations. The results show that light squeezing effects not only depends on the mean photon numbers and atomic initial state but also the degree of entanglement of the two-mode entangled coherent state optics field, whereas the coupling between two atoms does not affect the light squeezing effects. The light squeezing effects does not appear for a special kind of Bell state｜β11〉, however there can appear the light squeezing effects under some conditions for the other three Bell states.

关 键 词：量子光学 Be11态 双模纠缠相干光场 光场压缩 

分 类 号：O431.2[机械工程—光学工程]