Threshold Multiparty Controlled Teleportation of Arbitrary m-Qubit Quantum Information  

作　　者：YANG Yu-Guang WEN Qiao-Yan 

机构地区：[1]College of Computer Science and Technology, Beijing University of Technology, Beijing 100124, China [2]State Key Laboratory of Integrated Services Network, Xidian University, Xi＇an 710071, China [3]State Key Laboratory of Information Security （Graduate University of Chinese Academy of Sciences）, Beijing 100049, China [4]State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China

出　　处：《Communications in Theoretical Physics》2009年第10期593-596,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.2007CB311100;the National Natural Science Foundation of China under Grant No.60873191;the National High Technology Research and Development Program of China under Grant No.2006AA01Z419;the Major Research plan of the National Natural Science Foundation of China under Grant No.90604023;the Scientific Research Common Program of Beijing Municipal Commission of Education under Grant No.KM200810005004;the Scientific Research Foundation for the Youth of Beijing University of Technology under Grant No.97007016200701

摘　　要：We present a （t, .n） threshold multiparty controlled quantum teleportation protocol of an arbitrary m-qubit quantum state between two remote parties. The unknown m-qubit quantum state can be recovered by the receiver under control of a subset of the n controllers if the number of the subset is larger than or equal to a threshold, say, t, but not for any t - 1 or fewer controllers. Our scheme seems to be more practical and more flexible than other existing protocols. The quantum resource required is just m Einstein-Podolsky-Rosen （EPR） pairs plus some single photons. The techniques required are only Bell state measurement, single-qubit unitary operation and yon Neumann measurement. So our scheme is also feasible with present-day technique.

关 键 词：controlled teleportation threshold controlled teleportation ENTANGLEMENT 

分 类 号：O413[理学—理论物理] TG146.21[理学—物理]