| Relative entropy of entanglement of two-qubit ’X’ states |
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| 引用本文： | 黄接辉,刘念华,刘江涛,于天宝,何弦.Relative entropy of entanglement of two-qubit ’X’ states[J].中国物理 B,2010,19(11):110312-110312. |
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| 作者姓名： | 黄接辉 刘念华 刘江涛 于天宝 何弦 |
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| 作者单位： | Department of Physics, Nanchang University, Nanchang 330031, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No. 10804042), and also supported by the Scientific Research Foundation of the Education Department of Jiangxi Province, China (Project No. GJJ09440). |
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| 摘 要： | Two closest single-qubit states could be diagonalised by the same unitary matrix,which helps to find the relative entropy of entanglement of a two-qubit ’X’ state.We formulate two binary equations for the relative entropy of entanglement and the corresponding closest separable state of a given two-qubit ’X’ state.This approach can be applied to get the relative entropy of entanglement of many widely-discussed two-qubit states,such as pure states,Werner states,and so on.
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| 关 键 词： | relative entropy of entanglement two-qubit state |
| 收稿时间： | 2010-03-24 |
| 修稿时间： | 6/3/2010 12:00:00 AM |
Relative entropy of entanglement of two-qubit `X' states |
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| Huang Jie-Hui,Liu Nian-Hu,Liu Jiang-Tao,Yu Tian-Bao and He Xian.Relative entropy of entanglement of two-qubit `X' states[J].Chinese Physics B,2010,19(11):110312-110312. |
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| Authors: | Huang Jie-Hui Liu Nian-Hu Liu Jiang-Tao Yu Tian-Bao and He Xian |
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| Institution: | Department of Physics, Nanchang University, Nanchang 330031, China;Department of Physics, Nanchang University, Nanchang 330031, China;Department of Physics, Nanchang University, Nanchang 330031, China;Department of Physics, Nanchang University, Nanchang 330031, China;Department of Physics, Nanchang University, Nanchang 330031, China |
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| Abstract: | Two closest single-qubit states could be diagonalised by the same unitary matrix, which helps to find the relative entropy of entanglement of a two-qubit `X' state. We formulate two binary equations for the relative entropy of entanglement and the corresponding closest separable state of a given two-qubit `X' state. This approach can be applied to get the relative entropy of entanglement of many widely-discussed two-qubit states, such as pure states, Werner states, and so on. |
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| Keywords: | relative entropy of entanglement two-qubit state |
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