Deterministic and exact entanglement teleportation via the W state  

作　　者：陈秀波 温巧燕 孙中旭 上官丽英 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 Ministry of Education,Beijing University of Posts and Telecommunications [3]National Engineering Laboratory for Disaster Backup and Recovery,Beijing University of Posts and Telecommunications [4]Water Supply Company of Daqing Petroleum Administration

出　　处：《Chinese Physics B》2010年第1期41-45,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 60873191 and 60821001);the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 200800131016);the Key Project of Chinese Ministry of Education (Grant No. 109014);the China Postdoctoral Science Foundation Funded Project (Grant No. 20090450018);the Beijing Natural Science Foundation (Grant No. 4072020);the 111 Project (Grant No. B08004);the National Basic Research Program of China (Grant No. 2007CB311203)

摘　　要：Utilizing a three-particle W state, we come up with a protocol for the teleportation of an unknown two-particle entangled state. It is shown that the teleportation can be deterministically and exactly realized. Moreover, two-particle entanglement teleportation is generalized to a system consisting of many particles via a three-particle W state and a multi-particle W state, respectively. All unitary transformations performed by the receiver are given in a concise formula.Utilizing a three-particle W state, we come up with a protocol for the teleportation of an unknown two-particle entangled state. It is shown that the teleportation can be deterministically and exactly realized. Moreover, two-particle entanglement teleportation is generalized to a system consisting of many particles via a three-particle W state and a multi-particle W state, respectively. All unitary transformations performed by the receiver are given in a concise formula.

关 键 词：quantum teleportation W state unitary transformations 

分 类 号：O431.2[机械工程—光学工程] O413.1[理学—光学]