2019 Int. J. Mod. Phys. B 33 1950197; 2020 Int. J. Mod. Phys. B 34 2050022), we presented a method to judge the entanglement of 2-qubit system. The necessary and sufficient conditions for the 2qubit system being separable are that if the relevant coefficients is positive and the principal density matrix is separable, then the system is separable, otherwise it is entangled. Now in this paper, we try to generalize this criterion to a 3-qubit system, and then, we further generalize the criterion of 3-qubit system to an N-qubit system. This is a complicated and interesting issue."> Entanglement criterion of <i>N</i> qubit system - 必威体育下载

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    Tan Wei-Han, Zhao Chao-Ying, Guo Qi-Zhi
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    • Abstract views:3460
    • PDF Downloads:101
    • Cited By:0
    Publishing process
    • Received Date:27 July 2022
    • Accepted Date:14 September 2022
    • Available Online:29 December 2022
    • Published Online:05 January 2023

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