Quantum circuits for controlled teleportation of two-particle entanglement via a W state

被引：50
|
作者：
Chen, Xiu-Bo [1 ,2 ]
Zhang, Ning [1 ,2 ]
Lin, Song [1 ,2 ]
Wen, Qiao-Yan [1 ,2 ]
Zhu, Fu-Chen [3 ]
机构：
[1] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China
[2] Beijing Univ Posts & Telecommun, State Key Lab Networking & Switching Technol, Beijing 100876, Peoples R China
[3] Natl Lab Modern Commun, Chengdu 610041, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2008年 / 281卷 / 08期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
quantum teleportation; quantum circuit; positive operator-valued measure; W state;
D O I：
10.1016/j.optcom.2007.12.002
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A protocol for three-party controlled quantum teleportation is discussed. It is shown that an unknown two-particle entanglement can be teleported to any one of two receivers via the only one three-particle W state. We summarize all different unitary transformations performed by the receiver with a concise formula. The quantum circuits for the generalized measurement described by positive operator-valued measure (POVM), which is utilized to probabilistically distinguish the two non-orthogonal states, are explicitly constructed by means of quantum Toffoli gates. The efficient quantum circuits for implementing the teleportation are also provided. (C) 2007 Elsevier B.V. All rights reserved.
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页码：2331 / 2335
页数：5
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