摘要
采用求解Schrodinger方程和数值计算的方法,研究了处于GHZ类态的三个全同二能级纠缠原子与Fock态光场相互作用的动力学特性,讨论了原子布居算符和光场的二阶相干度与三原子体系初始态的纠缠度、Fock态光场的光场强度的成赖关系。结果表明:系统处在非纠缠态,原子布居呈现出周期性的崩塌和回复现象,当光场为真空场时,出现真空Rabi振荡现象;随着光场的增强,原子布居的Rabi振荡频率增大。当系统处在纠缠态,随着纠缠度的增加,光子开始出现聚束效应,在最大纠缠态,聚束效应和反聚束效应交替出现,二阶关联函数的振荡幅度随着纠缠度的增强而增强。
The dynamical properties in the system of three identical two-level entangled atoms interacting with the Fock states field are investigated by mean of Schro··dinger equation solution and numerical calculations. The results show that the time evolution of the atomic population operator and second order coherence degree depend on the degree of entanglement of the entangled atoms and the intensity of the Fock states optical field. If the two atoms are in unentangled state, the atomic population reveals the periodic collapse and revival phenomenon. The atomic population reveals vacuum Rabi oscillation when the optical field is in vacuum state, and the Rabi oscillation frequency of the atomic population is shown to increase with the growth of the intensity of the optical field. If the two atoms are in entangled state, the photon reveals the bunching phenomenon with the growth of the degree of the entangled state, and the second-order correlation function is shown to increase with the growth of the degree of the entangled state.
出处
《量子电子学报》
CAS
CSCD
北大核心
2006年第2期197-202,共6页
Chinese Journal of Quantum Electronics
基金
安徽省自然科学基金项目资助(03042401)
安徽省教育厅重点项目资助(2004kj005zd)
关键词
量子光学
GHZ类态
纠缠原子
Fock态光场
原子布居算符
二阶相干度
quantum optics
GHZ class states
entangled atom
lock states optical field
atomic population operator
second order coherence degree
