利用四原子Cluster态概率隐形传送两原子纠缠态

于立志; 吴韬

doi:doi:10.3788/gzxb20134205.0623

光子学报, 2013, 42 (5): 623, 网络出版: 2013-05-22

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

论文大纲

于立志 ^*吴韬

作者单位

阜阳师范学院物理系, 安徽阜阳 236037

量子光学概率隐形传态 Cluster态 Bell态测量幺正变换 Quantum optics Probabilistic teleportation Cluster state Bell state measurement Unitary transformation

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%.

Abstract

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%.

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于立志, 吴韬. 利用四原子Cluster态概率隐形传送两原子纠缠态[J]. 光子学报, 2013, 42(5): 623. YU Lizhi, WU Tao. Probabilistic Teleportation of Twoatom Entangled State via Fouratom Cluster State[J]. ACTA PHOTONICA SINICA, 2013, 42(5): 623.

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