原子玻色-爱因斯坦凝聚与二项式光场相互作用系统的保真度  

Fidelity of quantum state for interacting system of the binomial photon field and atomic Bose-Einstein condensate

作　　者：宫艳丽[1] 萨楚尔夫[1] 杨立森[1] 崔英华[1] 

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

出　　处：《量子电子学报》2008年第5期593-597,共5页Chinese Journal of Quantum Electronics

基　　金：国家自然基金(60467002);内蒙古自治区自然科学基金(200408020107);内蒙古高等学校科研基金(NJ03038)

摘　　要：利用全量子理论和量子信息中的保真度理论,研究了玻色-爱因斯坦凝聚原子与二项式光场相互作用系统的保真度。讨论了原子间相互作用强度、处于基态时超冷原子数和光场参数的不同取值对系统保真度的影响。结果表明:通过改变原子间相互作用强度和基态原子数可以改变系统保真度的幅值和振荡周期,而光场参数的改变只影响保真效果。适当选取参量可以得到较好量子信息保真。The fidelity evolution of quantum state under the interaction of the binomial photon field and atomic Bose-Einstein condensate （BEC） are studied by full quantum theory. The influences of the interaction among atoms of BEC, the average atomic number of atomic BEC and the parameter of light field on the fidelity are investigated. The results indicate that the amplitude and oscillated period of fidelity of quantum information for the interaction system can be controlled by choosing the intensity of the interaction among atoms and the average atomic number on the ground state. And the change of the light parameter only plays a role on the fidelity effect. The higher fidelity can be obtainedby choosing suitable parameters.

关 键 词：量子光学 玻色一爱因斯坦凝聚 二项式光场 保真度 

分 类 号：O431.2[机械工程—光学工程]