基于cluster态任意单粒子态可控量子信息共享  

Controlled Quantum Information Sharing of An Arbitrary One-particle State via Cluster State

作　　者：李艳平[1] 王天银[2] 尹宝银[3] 

机构地区：[1]陕西师范大学数学与信息科学学院,西安710072 [2]洛阳师范学院数学科学学院,河南洛阳471022 [3]陕西师范大学物理技术信息学院,西安710062

出　　处：《光子学报》2014年第9期191-195,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.61202317;61373150;61272436);陕西省自然科学基础研究计划项目(No.2012JQ8023);中央高校基金项目(No.GK201002041);河南省高校科技创新人才项目(No.13HASTIT042)资助

摘　　要：基于cluster态具有较强的纠缠顽固性,提出两个利用四粒子cluster态传送任意单粒子态的量子信息共享方案.第一个方案中发送者Alice、控制者Charlie和接收者Bob共享一个四粒子纠缠态,首先Alice对自己拥有的粒子执行一个三粒子Von-Neumann联合测量,然后Charlie对其拥有粒子执行Z基测量,最后Bob根据发送者和控制者的测量结果,对所拥有的粒子做适当的幺正变换,就能重建共享的单粒子任意态.第二个方案利用一个辅助粒子,发送者Alice、控制者Charlie只需做Bell基测量,Bob通过比特位翻转和幺正变换即可得到Alice传送的量子态.与已有方案相比,两方案信息共享的成功概率为100%,且只需四粒子cluster态为载体,可在目前实验室技术条件下实现.Based on the strong persistency of entanglement of cluster state, two quantum slaarmg scnemes were presented to realize the controlled teleportation of an arbitrarily one-particle using a four-particle cluster state as the quantum channel. In the first scheme,the sender Alice, controller Charlie and receiver Bob share a four-particle cluster entangled state. Firstly Alice performs a three-particle joint Von- Neumann measurement on her qubits. Then Charlie performs a quantum measurement on his qubit with Z basis. Finally Bob can reconstruct the shared single particle by doing unitary transformation according to the measured results from Charlie and Bob. In the second scheme, three parties also shared a four-particle cluster state and an auxiliary particle, Alice and Charlie only need Bell state measurements and Bob can get the transmitted state by performing a swap bit flip operation and one unitary transformation. Compared with the existing schemes, the success probability of these both schemes are 100% and the proposed schemes only need 4-particle cluster state as the quantum channel. Furthermore, the proposed schemes can he implemented under the current laboratory techniques.

关 键 词：量子通信 团簇态 BELL基测量 幺正变换 可控量子隐性传态 

分 类 号：TN918[电子电信—通信与信息系统] O431.2[电子电信—信息与通信工程]