原子-腔-光纤复合系统中的非定域性演化  

Dynamics of nonlocality in an atom-cavity-fiber compound system

作　　者：卢道明[1] 邱昌东[1] 

机构地区：[1]武夷学院机电工程学院,福建武夷山354300

出　　处：《光电子．激光》2015年第12期2428-2432,共5页Journal of Optoelectronics·Laser

基　　金：福建省自然科学基金(2015J01020);福建省教育厅A类科技(JA12327)资助项目

摘　　要：采用Mermin-Ardehali-Belinksii-Klyshko(MABK)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。In this paper,we consider the situation that three two-level atoms resonantly interacts with three cavities coupled by two optical fibers. The dynamics of nonlocality in the system is investigated via Mermin-Ardehali-Belinksii-Klyshko （MABK） inequality. The evolution of the state vector of the system is given by solving the Schrodinger equation when the total excitation number of the systems equals one. By means of the numerical calculation, we depict the evolution curves of parameter B describing MABK inequality. The effects of cavity-fiber coupling constant on the MABK inequality are discussed. The results obtained from the numerical method show that the parameter B is greater than one, and the evolu- tion curves of parameter B display the violation of MABK inequality. This indicates that the quantum state of three atoms in the system displays nonlocality. On the other hand, the average of parameter B increases and the violation of MABK inequality is strengthened with increase of cavity-fiber coupling constant. This also shows that the nonlocality of three atoms quantum state is strengthened with the increase of cavity-fiber coupling constant.

关 键 词：量子光学 原子-腔-光纤复合系统 非定域性 Mermin-Ardehali-Belinksii-Klyshko(MABK)不等式违背 

分 类 号：O431.2[机械工程—光学工程]