中国物理B ›› 2009, Vol. 18 ›› Issue (9): 3702-3705.doi: 10.1088/1674-1056/18/9/015

• • 上一篇    下一篇

Economical phase-covariant cloning with multiclones

张文海1, 叶柳2   

  1. (1)Department of Physics, Huainan Normal University, Huainan 232001, China;School of Physics and Material Science, Anhui University, Hefei 230039, China;Department of Physics & Electronic Engineering, Hefei Teachers College, Hefei 230601, China; (2)School of Physics and Material Science, Anhui University, Hefei 230039, China
  • 收稿日期:2008-11-19 修回日期:2008-12-23 出版日期:2009-09-20 发布日期:2009-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10674001), and the Program of the Education Department of Anhui Province of China (Grant No KJ2007A002).

Economical phase-covariant cloning with multiclones

Zhang Wen-Hai(张文海)a)b)c)† and Ye Liu(叶柳)b)   

  1. a Department of Physics, Huainan Normal University, Huainan 232001, China; b School of Physics and Material Science, Anhui University, Hefei 230039, Chinac Department of Physics & Electronic Engineering, Hefei Teachers College, Hefei 230601, China
  • Received:2008-11-19 Revised:2008-12-23 Online:2009-09-20 Published:2009-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10674001), and the Program of the Education Department of Anhui Province of China (Grant No KJ2007A002).

PDF (PC)

635

赞

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'Ariano G M and Macchiavello C 2003 Phys. Rev. A 67 042306]. The derived transformations cover the previous contributions [Delgado Y, Lamata L et al, 2007 Phys. Rev. Lett.98 150502] in which M must be odd.

Abstract: 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'Ariano G M and Macchiavello C 2003 Phys. Rev. A 67 042306]. The derived transformations cover the previous contributions [Delgado Y, Lamata L et al, 2007 Phys. Rev. Lett.98 150502] in which M must be odd.

Key words: quantum cloning, economical phase-covariant cloning

中图分类号:  (Quantum information)

  • 03.67.-a