Characterization of four-qubit states via Bell inequalities |
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| Authors: | Hui Zhao XingHua Zhang ShaoMing Fei ZhiXi Wang |
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| Institution: | 15884. College of Applied Sciences, Beijing University of Technology, Beijing, 100124, China
25884. School of Mathematical Sciences, Capital Normal University, Beijing, 100048, China
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| Abstract: | A set of Bell inequalities classifying the quantum entanglement of four-qubit states is presented. These inequalities involve only two measurement settings per observer and can characterize fully separable, bi-separable and tri-separable quantum states. In addition, a quadratic inequality of the Bell operators for four-qubit systems is derived. |
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