| Mutual Information of Pauli Channels with Correlated Noise |
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| 作者姓名： | 侯丽珍 方卯发 |
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| 作者单位： | Department of Physics, Hunan Normal University, Changsha 410081 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 10374025, and the Scientific Research Fund of Education Department of Hunan Province under Grant No 06A038. |
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| 摘 要： |
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| 关 键 词： | 共有信息 Pauli通道 噪音 输入状态 |
| 收稿时间： | 2007-05-11 |
Mutual Information of Pauli Channels with Correlated Noise |
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| HOU Li-Zhen,FANG Mao-Fa.Mutual Information of Pauli Channels with Correlated Noise[J].Chinese Physics Letters,2007,24(12):3308-3311. |
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| Authors: | HOU Li-Zhen FANG Mao-Fa |
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| Institution: | Department of Physics, Hunan Normal University, Changsha 410081 |
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| Abstract: | A general formula for the mutual information of the Paufi channels with memory modelled by correlated noise is derived. It is shown that the mutual information depends on the channel shrinking factor, the input state parameter and the channel memory coefficient. The analyses based on the general formula reveal that the entanglement is always a useful resource to enhance the mutual information of some Pauli channels, such as the bit flip channel and the bit-phase flip channel. Our analyses also show that the entanglement is not advantageous to the reliable transmission of classical information for some Pauli channels at any time, such as the phase flip channel and the phase damping channel. |
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| Keywords: | 03 67 Hk 03 67 -a |
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