基于4粒子团簇态实现量子态的双向通信  

To Realize Two-Way Communication of Quantum State Via Four-Qubit Cluster State

作　　者：杨幼凤[1] 叶志清[1,2] 

机构地区：[1]江西师范大学物理与通信电子学院,江西南昌330022 [2]江西省光电子与通信重点实验室,江西南昌330022

出　　处：《江西师范大学学报（自然科学版）》2013年第5期497-499,共3页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金(61368001);江西省自然科学基金(20114BAB202003);江西省教育厅科技课题(GJJ10401)资助项目

摘　　要：提出了一个用4粒子团簇态作为量子信道传输量子态信息以实现双向通信的方案.在该方案中,通信双方Alice和Bob事先共享一个4粒子团簇态.在通信过程中:首先,将4粒子团簇态与双方要传递的量子态信息共同构成系综态;然后,Alice和Bob分别对自己拥有的部分粒子作Bell基的联合测量,并把测量结果通过经典信道告诉对方;最后,Alice和Bob根据对方公布的测量结果,作相应的幺正变换,就可以在自己的粒子上重现对方要传送的量子态信息.这样就达到了实现量子态的双向通信的目的.A scheme of using four-qubit cluster state as quantum channel（QC） to convey the quantum state informa- tion is proposed to realize two-way communication. In this scenario, two sides of communication, Alice and Bob, share a four-qubit cluster state. In the process of communication, at first, four-qubit cluster state form a whole system with quantum state information two sides have. Then, Alice and Bob perform Bell-state joint measurements to their own part qubits respectively ,and tell the measured results to each other via classical channel（CC）. Finally, accord- ing to the measured results,Alice and Bob make corresponding unitary transformations, hence its own party can re- appear the opposite quantum state information. So two-way communication of quantum state information is achieced.

关 键 词：4粒子团簇态 量子态信息 双向通信 

分 类 号：TN918[电子电信—通信与信息系统]