一类最优相位协变量子克隆

量子电子学报 , 2011, 28(5): 583-587. doi: 10.3969/j.issn.1007-5461.2011.05.012

一类最优相位协变量子克隆

张文海 ^1, , 戴结林 ^2, , 曹卓良 ^3, , 杨名 ^4,

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

2.合肥师范学院物理系,安徽合肥 230061;

3.合肥师范学院物理系,安徽合肥 230061;安徽大学物理与材料科学学院,安徽合肥 230039

4.安徽大学物理与材料科学学院,安徽合肥,230039

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

A class of optimal phase-covariant quantum cloning

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.

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一类最优相位协变量子克隆

A class of optimal phase-covariant quantum cloning

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