利用四原子Cluster态概率隐形传送两原子纠缠态  

Probabilistic Teleportation of Two-atom Entangled State via Four-atom Cluster State

作　　者：于立志[1] 吴韬[1] 

机构地区：[1]阜阳师范学院物理系,安徽阜阳236037

出　　处：《光子学报》2013年第5期623-626,共4页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.51271059;11273008);安徽省高等学校优秀人才基金项目(No.2009SQRZ152);安徽省教育厅自然科学研究项目(No.KJ2012Z309)资助

摘　　要：提出两个二能级原子纠缠态的隐形传态方案,方案中选用由四个全同二能级原子组成的非最大纠缠Cluster态作为量子信道.研究表明,接收者根据发送者传送的经典信息,通过引入一个附加原子并实施相应的幺正变化,即可以一定的概率重构原子态,此概率由Cluster态中绝对值最小的两个系数决定.该方案中使用的是Cluster非最大纠缠态作为量子信道,因此与其他方案相比该方案可以节约更多的纠缠资源和经典信息.如果使用Cluster最大纠缠态作为量子信道,那么此方案即为一般的量子传态方案,成功传送的概率为100%.A scheme for teleporting an unknown two two-level atoms entangled state via four identical two-level atoms non-maximally entangled Cluster state as quantum channel is proposed.In the scheme,the receiver Bob can reconstruct the original state with a certain probability by introducing an auxiliary atom and operating unitary transformations according to the sender Alice′s measurement results,and the successful probability is determined by the smallest two coefficients′ absolute values of the Cluster state.The considerable advantage of the scheme is that a non-maximally entangled Cluster state is employed as quantum channel,thus,the scheme can greatly reduce the amount of entanglement resources and need less classical bits.If a maximally entangled Cluster state is employed as quantum channel,the probabilistic teleportation scheme becomes usual teleportation,of which the successful probability is 100%.

关 键 词：量子光学 概率隐形传态 Cluster态 BELL态测量 幺正变换 

分 类 号：O431.2[机械工程—光学工程]