Economical phase-covariant cloning with multiclones  

作　　者：张文海 叶柳 

机构地区：[1]Department of Physics,Huainan Normal University [2]School of Physics and Material Science,Anhui University [3]Department of Physics & Electronic Engineering,Hefei Teachers College

出　　处：《Chinese Physics B》2009年第9期3702-3705,共4页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No 10674001);the Program of the Education Department of Anhui Province of China (Grant No KJ2007A002)

摘　　要：This paper presents a very simple method to derive the explicit transformations of the optimal economical 1 to M phase-covariant cloning. The fidelity of clones reaches the theoretic bound [D＇Ar]ano G M and Macchiavello C 2003 Phys. Rev. A 67 042306]. The derived transformations cover the previous contributions [Delgado Y, Lamata Let al, 2007 Phys. Rev. Lett. 98 150502] in which M must be odd.This paper presents a very simple method to derive the explicit transformations of the optimal economical 1 to M phase-covariant cloning. The fidelity of clones reaches the theoretic bound [D＇Ar]ano G M and Macchiavello C 2003 Phys. Rev. A 67 042306]. The derived transformations cover the previous contributions [Delgado Y, Lamata Let al, 2007 Phys. Rev. Lett. 98 150502] in which M must be odd.

关 键 词：quantum cloning economical phase-covariant cloning 

分 类 号：O413.1[理学—理论物理]