中国物理B ›› 2007, Vol. 16 ›› Issue (7): 1843-1847.doi: 10.1088/1009-1963/16/7/006

• GENERAL • 上一篇    下一篇

The Holevo capacity of a generalized amplitude-damping channel

侯丽珍, 方卯发   

  1. Department of Physics, Hunan Normal University, Changsha 410081, China
  • 收稿日期:2006-09-30 修回日期:2007-01-29 出版日期:2007-07-04 发布日期:2007-07-04
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No~10374025), and the Natural Science Foundation of Hunan Normal University, China (Grant No~22040640).

The Holevo capacity of a generalized amplitude-damping channel

Hou Li-Zhen(侯丽珍) and Fang Mao-Fa(方卯发)†   

  1. Department of Physics, Hunan Normal University, Changsha 410081, China
  • Received:2006-09-30 Revised:2007-01-29 Online:2007-07-04 Published:2007-07-04
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No~10374025), and the Natural Science Foundation of Hunan Normal University, China (Grant No~22040640).

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摘要： The Holevo capacity of a generalized amplitude-damping channel is investigated by using a numerical method. It is shown that the Holevo capacity depends on the channel parameters representing the ambient temperature and fidelity. In particular, under a special condition, the Holevo capacity of the generalized amplitude-damping channel can be written as an analytical expression.

Abstract: The Holevo capacity of a generalized amplitude-damping channel is investigated by using a numerical method. It is shown that the Holevo capacity depends on the channel parameters representing the ambient temperature and fidelity. In particular, under a special condition, the Holevo capacity of the generalized amplitude-damping channel can be written as an analytical expression.

Key words: the Holevo capacity, generalized amplitude-damping channel, channel parameters

中图分类号:  (Quantum information)

  • 03.67.-a
02.60.-x (Numerical approximation and analysis)