摘要
应用量子计算方法,对三原子体系中三体间、两两间以及Tavis-Cummings模型系统的纠缠度进行了详细计算.通过求解原子与光场相互作用系统态矢满足的薛定谔方程,得出了该模型三体间纠缠度随时间的演化规律.结果表明:原子光场相互作用系统的纠缠度呈现随时间变化的周期振荡性,周期大小与系统初始状态有关.系统中三体间的纠缠度与三体中两两间纠缠度的振荡周期有关.随着时间的变化,体系由开始的非纠缠状态可演化为三体最大或部分纠缠态.
Using the method of quantum calculation,the entanglement degrees of the threebody system,any two-body among the them,and the Tavis-Cummings model system are calculated in detail.The evolution property of three-body entanglement degree is showed via solving the Schrdinger equation of the atom-light field system.It is found that the entanglement degree of the atom-light field system shows the periodic oscillations with the time and the cycle is closely related to the initial state of the system.The entanglement degree in the three-body system has the same cycle as that of the any two-body in the three-body system.The system will evolve to a three-body maximum or partly entangled state from the initial non-entangled state.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第1期33-37,共5页
Journal of Shaanxi Normal University：Natural Science Edition
基金
陕西省自然科学基金资助项目(SJ08A25)
陕西省教育厅专项科研基金资助项目(08JK286)
关键词
量子光学
纠缠态
三体纠缠
纠缠度
quantum optics
entangled state
tripartite entanglement
entanglement degree
