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Scheme for cloing a three-particle GHZ class state with assistance

ISSN号：0253-6102
期刊名称：Communications in Theoretical Physics
时间：2011.8.8
页码：771-774
分类：TP311.13[自动化与计算机技术—计算机软件与理论;自动化与计算机技术—计算机科学与技术] O413.1[理学—理论物理;理学—物理]
作者机构：[1]State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China, [2]Key Laboratory of Network and Information Attack and Defence Technology of MOE, Beijing University of Posts and Telecommunications, Beijing 100876, China, [3]National Engineering Laboratory for Disaster Backup and Recovery, Beijing University of Posts and Telecommunications, Beijing 100876, China, [4]School of Mathematics and Information Sciences, Henan University, Kaifeng 475004, China
相关基金：＊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） and the 111 Project （No. B08004）
相关项目：素数论与丢番图逼近若干问题

关键词：输入状态, 粒子, GHZ, 量子通道, EPR对, 投影测量, 发件人, GHZ, assisted clone, quantum teleportation, remote state preparation, complete orthogonal basis, three- particle projective measurement

中文摘要：

我们的担心与高可能性是设计能生产一个三粒子的 GreenbergerHorneZeilinger (GHZ ) 班的一个完美的拷贝的一个帮助克隆的计划州的。在协议的第一个阶段，到由使用三 EPR 的接收装置的输入状态作为量隧道配对的发送者 teleports。在协议的第二个阶段，互相直角的基础向量的一个新奇集合被构造。与通过在这个基础下面的三粒子的射影的大小的 preparer 的帮助，一个原来的状态的完美的拷贝能被发送者与概率 1/2 重建。而且，计划的古典通讯费用也被计算。

英文摘要：

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.

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