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.
引用
收藏
页码：2331 / 2335
页数：5
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