Matched witness for multipartite entanglement |
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| Authors: | Xiao-yu Chen Li-zhen Jiang Zhu-an Xu |
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| Affiliation: | 1.College of Information and Electronic Engineering,Zhejiang Gongshang University,Hangzhou,China;2.Department of Physics,Zhejiang University,Hangzhou,China |
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| Abstract: | Entanglement criteria for multipartite entangled states are obtained by matching witnesses to multipartite entangled states. The necessary and sufficient criterion of separability for three qubit X states is given as an example to illustrate the procedure of finding a criterion. The result is utilized to obtain the noise tolerance of W state. The necessary and sufficient criteria of three partite separability and full separability for four qubit noisy cluster states, three partite separability for four qubit noisy GHZ states are obtained. |
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