基于第三方控制的量子双向传态  

Two-way quantum teleportation controlled by a third party

作　　者：邹昕[1] 叶志清[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：《量子电子学报》2012年第6期683-687,共5页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(60967002);江西省自然科学基金(20114BAB202003);江西省教育厅科技项目(GJJ10401)资助项目

摘　　要：提出一个基于第三方控制的量子双向传态方案:通信双方Alice、Bob和控制方Charlie事先共享一个六粒子团簇态,通信开始后,Alice、Bob分别对自己拥有的部分粒子作Bell基联合测量(BSM),若控制方同意双方通信,则对自己拥有的粒子对作测量,将粒子所处的态公布;通信双方根据控制方公布的测量结果,对各自的某些粒子作适当的幺正变换,即可在这些粒子上重建对方要传的态。由于加入了第三方的控制,双向传态的安全性得到了提高。A scheme of two-way quantum teleportation controlled by a third party was proposed. Two sides of communication （Alice and Bob） and the controller Charlie shared a six-qubit cluster state in advance. Firstly, Alice and Bob performed Bell-state measurements（BSMs） on parts of their qubit pairs, respectively. If Charlie agreed them to communication, he should measure his qubits and announce their states. According to Charlie.s measured results, the two sides of communication performed some appropriately unitary transformations on their qubits respectively. Then they were able to reconstruct each other＇s unknown state on their own qubits. The security of two-way communication was improved because of the control of the third party.

关 键 词：量子光学 双向传态 Bell基联合测量 六粒子团簇态 第三方控制 

分 类 号：TN918[电子电信—通信与信息系统]