基于Tavis-Cummings模型实现非定域三原子系统量子特性的远程控制  

Remotely controlling the non-local three-atom system quantum character in the Tavis-Cummings model

作　　者：韩峰[1,2] 夏云杰[2] 杜少将[1] 

机构地区：[1]济宁学院物理系,曲阜273155 [2]曲阜师范大学物理工程学院,曲阜273165

出　　处：《原子与分子物理学报》2009年第6期1107-1113,共7页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(10774088)

摘　　要：运用全量子理论并结合数值计算方法,研究了三个二能级原子系统的量子特性.初始三原子处于W纠缠态,让其中的两原子A、B与相干态光腔场发生共振作用,经腔QED演化以后,对原子进行Bell基测量,通过调节相干态光场的强度和原子间的偶极相互作用,来控制腔外原子C的布居差演化;对相干态光场进行光子探测,通过改变探测到的光子数、相干光场参量和原子间偶极相互作用,来控制腔外原子C的偶极压缩,最终实现了远程操纵腔外原子非经典特性的目的.We use quantum theory and numerical method to study the non-local three-atom system quantum characteristic. The initial state of the three-atom system is on the three-body entangled W state,and the two atoms A, B can interact resonantly with a single-mode field in the coherent state. During the course of Cavity-QED evolution of the total system,we make Bell measurements to the atoms A and B. Through operating the intensity of the coherent field and the dipole-dipole coupling interaction between atoms A and B,we can control the atomic occupancy of atom C outside of the cavity. After taking photon detection to the coherent field,we can control C atomic dipole squeezing through manipulating the evolution time, the number of the detected photons, the parameter of coherent field and the dipole-dipole coupling interaction between atoms A and B. So we are easy to remotely control the quantum character of the atom outside of the coherent cavity.

关 键 词：量子光学 Tavis—Cummings模型 W纠缠态 BELL基测量 原子布居差 原子偶极压缩 

分 类 号：O431.2[机械工程—光学工程]