一类最优相位协变量子克隆

J4 ›› 2011, Vol. 28 ›› Issue (5): 583-587.

一类最优相位协变量子克隆

张文海^1,3,戴结林²,曹卓良^2,3,杨名³

1 淮南师范学院物理系，安徽淮南 232001;
2 合肥师范学院物理系，安徽合肥 230061;
3 安徽大学物理与材料科学学院，安徽合肥 230039

收稿日期:2010-09-25 修回日期:2011-04-07 出版日期:2011-09-28 发布日期:2011-08-18
通讯作者: 张文海（1968-）博士，讲师，主要从事量子光学和量子信息方面的研究。 E-mail:zhangwenhaianhui@yahoo.com.cn
基金资助:
国家自然科学基金(10704001)；安徽省级高等学校自然科学研究（KJ2010ZD08，KJ2010B172，KJ2010B204）；淮南师范学院博士研究启动资金资助项目

A class of optimal phase-covariant quantum cloning

ZHANG Wenhai^1,3, DAI Jielin²,CAO Zhuoliang^2,3, YANG Ming³

1 Department of Physics, Huainan Normal University, Huainan 232001, China;
2 Department of Physics, Hefei Teachers College, Hefei 230061, China;
3 School of Physics and Material Science, Anhui University, Hefei 230039, China

Received:2010-09-25 Revised:2011-04-07 Published:2011-09-28 Online:2011-08-18

摘要/Abstract

摘要：

相位协变量子克隆在量子密码术中有重要的应有。利用一般的量子克隆幺正变换形式，得到克隆的保真度。结果表明存在一类最优相位协变量子克隆。对这一类量子克隆的幺正变换，拷贝的保真度最大且相等。基于腔量子电动力学，提出实现这类量子克隆幺正变换的实验方案。

关键词: 量子信息, 量子克隆, 最优相位协变量子克隆, 腔量子电动力学

Abstract:

The phase-covariant quantum cloning has an important application in quantum cryptography. By exploiting a general unitary transformation, the fidelity of clones is derived. The result shows that there exists a class of the optimal phase-covariant quantum cloning. For these explicit transformations of the phase-covariant quantum cloning, the fidelity of clones is maximal and equal. Based on the cavity quantum electrodynamics, a scheme to implement the transformations of quantum cloning is proposed.

Key words: quantum information, quantum cloning, optimal phase-covariant quantum cloning, cavity quantum electrodynamics

中图分类号:

O431. 2

张文海戴结林曹卓良杨名. 一类最优相位协变量子克隆[J]. J4, 2011, 28(5): 583-587.

ZHANG Wenhai, DAI Jielin, CAO Zhuoliang, YANG Ming . A class of optimal phase-covariant quantum cloning[J]. J4, 2011, 28(5): 583-587.

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