Relative entropy of entanglement of two-qubit `X' states |
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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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