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Entanglement-Assisted Classical Capacity of a Generalized Amplitude Damping Channel |
| HOU Li-Zhen;FANG Mao-Fa |
| Department of Physics, Hunan Normal University, Changsha 410081 |
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| Cite this article: |
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HOU Li-Zhen, FANG Mao-Fa 2007 Chin. Phys. Lett. 24 2482-2485 |
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Abstract The entanglement-assisted capacity of a generalized amplitude damping channel is investigated by using the properties of partial symmetry and concavity of mutual information. The numerical and analytical results of the entanglement-assisted capacity are obtained under certain conditions. It is shown that the entanglement-assisted capacity depends on the channel parameters representing the ambient temperature and dissipation, and the prior entanglement between sender and receiver can approximately double the classical capacity of the generalized amplitude damping channel.
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| Keywords:
03.67.Hk
03.67.-a
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Received: 04 February 2007
Published: 16 August 2007
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