原子玻色-爱因斯坦凝聚与单模光场相互作用系统的保真度  

Fidelity of Quantum State for Interacting System of Atomic Bose-Einstein Condensate and Single-Mode Light Field

作　　者：李明[1] 

机构地区：[1]桂林理工大学理学院,广西桂林541004

出　　处：《电子科技大学学报》2014年第4期542-546,共5页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金(11364010)

摘　　要：利用格子液体方法对二能级原子玻色-爱因斯坦凝聚与单模光场相互作用系统的哈密顿量进行了改进,并且研究了初始光场的平均光子数、光场与原子间的相互作用强度,以及光场的圆频率对二能级原子玻色-爱因斯坦凝聚与单模光场相互作用系统的量子态保真度的影响。结果表明,二能级原子玻色-爱因斯坦凝聚单模光场系统的保真度呈现崩塌回复现象,初始光场的平均光子数越小,系统的保真度越好;光场和原子间的相互作用强度和光场的圆频率对系统的保真度没有明显的影响。The Hamiltonian operator of a system of two-level atomic Bose-Einstein condensate interacting with single-mode squeezed coherent light field is improved in terms of the lattice-liquid model. The influence on the fidelity of quantum state of the system from the average photon number of the initial light field, the interaction intensity between light field and atoms, and the circular frequency of the light field is studied. The results show that the fidelity of the system presents a collapse-revert phenomenon. The smaller average photon number of the initial light field, the better the fidelity of the system; the interaction intensity between light field and atoms and the circular frequency of the light field have no obvious influence on the fidelity of the system.

关 键 词：玻色-爱因斯坦凝聚 保真度 单模光场 二能级原子 

分 类 号：O431[机械工程—光学工程]