数态光场与3个两能级原子相互作用系统的保真度  

Fidelity of the System of a Fock State Field Interacting with Three Two-level 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）》2014年第3期259-263,共5页Journal of Hebei Normal University：Natural Science

基　　金：内蒙古自然科学基金(2013MS0115);内蒙古师范大学"十百千"人才资助项目(RCPY-2-2012-K-038)

摘　　要：根据量子信息保真度理论,研究了数态光场与初始处于GHZ态的3个两能级原子相互作用系统中量子态保真度的演变规律.对系统中原子和场取迹后不同量子态保真度的变化规律和场的初始光子数对系统中不同量子态保真度的影响进行了分析与研究.结果表明,初始光子数越大,量子态保真度随时间振荡频率越大.The character of the time evolution of the fidelity of quantum state in a system of a Fock state field interacting with three two-level atoms have been studied by means of numerical calculation and quantum fidelity. The variation of the fidelity of different quantum states which was taken the track on the field and the atomic and the influence of photon number on the fidelity of different quantum states have been discussed. The numerical results show that the greater the photon numbers are, the faster frequency of the oscillation of the fidelity of quantum state becomes.

关 键 词：量子信息 GHZ态 保真度 3个两能级原子 

分 类 号：O413.2[理学—理论物理]