相干原子束-相干腔场相互作用系统中量子信息的交换传递  

Quantum information transfer in the system of coherent-atoms interacting with coherent-cavity-field

作　　者：王菊霞[1] 杨志勇[1] 安毓英[1] 

机构地区：[1]西安电子科技大学技术物理学院

出　　处：《原子与分子物理学报》2008年第2期462-466,共5页Journal of Atomic and Molecular Physics

基　　金：陕西省自然科学基金(2004A19,2001SL04);陕西省科技攻关项目(2002K05-G9);渭南师院重点科研基金项目(08YKF014)

摘　　要：利用演化因子给出了相干原子束与相干腔场相互作用系统的演化规律.研究了其相互作用过程,结果表明:量子信息不但可以在相干原子与相干腔场之间相互交换,而且可以在不同相干腔场之间传递.还发现:在普遍情况下,信息交换传递的条件与原子跃迁的频率(ωa,k)及其相对相位(ξ)、光场的频率(ωf,k)及其相对相位(η)、原子与光场的耦合强度(g)和相互作用时间(t)等均有关,但当原子与光场发生共振相互作用时,其条件仅与g、t有关.The evolution law of the system which consists of coherent-atoms interacting with coherent-cavity-field is shown by using evolutional factor.The process of interaction in the system is studied.It is found that the quantum information can be transfer not only between cavities and atoms but also different sets of cavities.Furthermore,the conditions of information exchange are usually related to the atoms transition frequency（ωa,k） and its relative phase（ξ）,the light-field frequency（ωf,k） and its relative phase（η）,the coupled intensity between atom and light-field（g）,as well as the interaction time（t）.But it is only related to g and t under the resonance interaction atoms with light-field.

关 键 词：量子信息学 量子纠缠信息 相干原子束 相干腔场 交换传递 

分 类 号：O431.2[机械工程—光学工程]