原子与双模腔相互作用系统中光场的量子特性

研究双模间存在耦合情况下,二能级原子与双模腔场相互作用系统中光场的压缩效应、反聚束效应和亚泊松分布等量子特性。通过对两模间耦合系数取不同值时Mandel Q函数演化曲线的比较,讨论了两模间耦合系数对光子统计分布的影响。研究结果表明,光场呈现出反聚束效应和亚泊松分布,以及两模间呈现反关联等量子特性,但光场不呈现压缩效应;另一方面,随两模间耦合系数的增大,光场的亚泊松分布效应减弱。     

原子-腔-光纤复合系统中的非定域性演化

采用Mermin-Ardehali-Belinksii-Klyshko(MAB K)不等式,讨论了原子-腔-光纤 复合系统中三原子态的非定域性。通过解薛定谔方程,求出了激发数等于1时系统的态矢演 化规律。利用 数值计算方法,描绘了反映MABK不等式违背参量B的演化曲线, 讨论了腔场与光纤模间耦合系数对 MABK不等式违背的影响。研究结果表明:参量B呈现大于1现象 ,即MABK不等式被违背,表明系 统中三原子量子态呈现非定域性;另一方面,随腔场与光纤模间耦合系数增大,MABK不等式 违背增强。     

Tripartite entanglement properties in the system of atoms interacting with three coupled cavities

It is considered that three identical two-level atoms are separately trapped in three coupled single-mode optical cavities, and each atom resonantly interacts with cavity via a one-photon transition. The tripartite entanglement dynamics among atoms is studied. The influence of cavity-cavity coupling constant on the tripartite entanglement among atoms is discussed. The results obtained using the numerical method show that the tripartite entanglement among atoms has a nonlinear relation with the cavity-cavity coupling coefficient. On the other hand, the three-body entanglement is the result of the coherent superposition of the two-body entanglements.