纠缠态原子与压缩真空场Raman相互作用的量子信息保真度  

Fidelily of quantum information in a pair atoms of entanglement state interacting with the squeezed vacuum field

作　　者：田永红[1] 徐大海[1] 韩立波[1] 

机构地区：[1]长江大学物理科学与技术学院

出　　处：《原子与分子物理学报》2006年第2期255-261,共7页Journal of Atomic and Molecular Physics

基　　金：湖北省高等学校科研基金(2002B04002);湖北省高层次人才项目.

摘　　要：利用全量子理论和数值计算方法研究了两个全同的纠缠二能级原子与压缩真空场Raman相互作用的量子信息保真度.结果表明,系统、原子和场的保真度随初始光场的压缩参数的增加而急剧减小,且与两原子体系的纠缠度和原子间偶极-偶极相互作用强度相关联.The fidelities of quantum information of two identical two-level atoms of entanglement state Raman interacting with the squeezed vacuum field are studied by means of the fully quantum theory and numerical calculations. The results shows the fidelity of system, atoms and field will drastically decrease as the squeezing parameter of the initial light increases, and that the fidelity is correlated with the degree of entanglement of the initial two identical two-level atoms and the intensity of dipole-dipole interaction between atoms.

关 键 词：量子光学 纠缠态原子 压缩真空场 纠缠度 偶极-偶极相互作用 

分 类 号：O431[机械工程—光学工程]