数态光场与2原子相互作用系统保真度的调控  

Control of Fidelity in the System of a Fock State Field Interacting with Two Atoms

作　　者：苏少龙[1] 萨楚尔夫[1,2] 李鹏茂 

机构地区：[1]内蒙古师范大学物理与电子信息学院,内蒙古呼和浩特010022 [2]内蒙古师范大学图书馆,内蒙古呼和浩特010022

出　　处：《河北师范大学学报（自然科学版）》2015年第4期308-312,共5页Journal of Hebei Normal University：Natural Science

基　　金：内蒙古自治区自然科学基金(2013MS0115);内蒙古师范大学"十百千"人才培养基金(RCPY-2-2012-K-038)

摘　　要：利用数值计算的方法研究了数态光场与初始处于激发态的2个两能级原子相互作用系统的保真度,讨论了光场的失谐量、光场的光子数和对原子操作后对系统保真度的影响.结果表明,不对原子进行操作,初始时刻信息完全不失真,并且可以通过控制场和原子的失谐量和光场的光子数来操控系统保真度的振荡频率、峰值和周期性;对原子进行操作,初始时刻信息就出现失真现象,而且可以通过操作经典场来实现对系统保真度的调控.By means of numerical methods, the fidelity of the system of a lock state field interacting with the two two-level atoms have been studied. The effects of cavity-atoms detuning, photon number and manipulation of the atom on fidelity of the system are discussed. The results show that the information is undistorted completely in the initial moment in the absence of manipulation of the atom. Moreover the frequency of the oscillation, the peak and the period of fidelity of the system can be controlled by cavity-atoms detuning,photon number and manipulation of the atom. The Information is distorted in the initial moment in the presence of the manipulation of atom. Fidelity of the system can be controlled by the manipulation of the classical filed.

关 键 词：量子信息 2个两能级原子 保真度 纠缠调控 

分 类 号：O431[机械工程—光学工程]