Scheme for Cloing a Three-Particle GHZ Class State with Assistance  

作　　者：马松雅 陈秀波 汤平 钮心忻 杨义先 

机构地区：[1]State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications [2]Key Laboratory of Network and Information Attack and Defence Technology of MOE,Beijing University of Posts and Telecommunications [3]National Engineering Laboratory for Disaster Backup and Recovery,Beijing University of Posts and Telecommunications [4]School of Mathematics and Information Sciences,Henan University

出　　处：《Communications in Theoretical Physics》2011年第5期771-774,共4页理论物理通讯（英文版）

基　　金：Supported by the National Basic Research Program of China(973 Program)under Grant No.2007CB311203;the National Natural Science Foundation of China under Grant Nos.61003287 and 60821001;the Specialized Research Fund for the Doctoral Program of Higher Education(20100005120002);the Fundamental Research Funds for the Central Universities(No.BUPT2009RC0220);the 111 Project(No.B08004)

摘　　要：Our concern is to design an assisted-clone scheme which can produce a perfect copy of a three-particle Oreenberger-Horne-Zeilinger （GHZ） class state with a high probability. In the first stage of the protocol, the sender teleports the input state to the receiver by using three EPR pairs as the quantum channel. In the second stage of the protocol, a novel set of mutually orthogonal basis vectors is constructed. With the assistance of the preparer through a three-particle projective measurement under this basis, the perfect copy of an original state can be reestablished by the sender with the probability 1/2. Moreover, the classical communication cost of the scheme is also calculated.

关 键 词：assisted clone quantum teleportation remote state preparation complete orthogonal basis three- particle projective measurement 

分 类 号：O413[理学—理论物理]