Abstract
The geometric measure of entanglement plays important role in quantum entanglement of multipartite cases. In this paper, with the eigenvalues of matrices, new Z-eigenvalue inclusion sets are given, some sufficient conditions for the positive definiteness of fourth-order tensors are presented based on the Z-eigenvalue inclusion sets, and then, upper and lower bounds of the geometric measure of entanglement for 4-qubit states are given. In addition, the upper bound of the geometric measure of entanglement is also applied to 4-qubit mixed state case. Finally, numerical experiments are reported to show the efficiency of the proposed new results.
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Acknowledgements
This work is supported by the Guizhou Province Natural Science Foundation in China (Qian Jiao He KY [2020]094, [2022]017), the Science and Technology Foundation of Guizhou Province, China (Qian Ke He Ji Chu ZK[2021]Yi Ban 014), the Key Laboratory of Evolutionary Artificial Intelligence in Guizhou (Qian Jiaoji [2022] No. 059) and the Key Talens Program in digital economy of Guizhou Province.
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Formal analysis and investigation: Jun He and Qingyu Zeng; Writing - original draft preparation: Jun He; Writing - review and editing: Yanmin Liu and Qingyu Zeng; Funding acquisition: Jun He; Supervision: Yanmin Liu.
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He, J., Liu, Y. & Zeng, Q. New Z-eigenvalue inclusion theorem of tensors with application to the geometric measure of entanglement. Quantum Inf Process 22, 134 (2023). https://doi.org/10.1007/s11128-023-03890-w
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DOI: https://doi.org/10.1007/s11128-023-03890-w