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.
Received: 30 September 2006
Revised: 29 January 2007
Accepted manuscript online:
Fund: 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).
Cite this article:
Hou Li-Zhen(侯丽珍) and Fang Mao-Fa(方卯发) The Holevo capacity of a generalized amplitude-damping channel 2007 Chinese Physics 16 1843
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