Tighter constraints of multiqubit entanglement

Long-Mei Yang, Bin Chen, Shao-Ming Fei, and Zhi-Xi Wang

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Submission date: 11. Feb. 2019
Pages: 16
published in: Communications in theoretical physics, 71 (2019) 5, p. 545-554 
DOI number (of the published article): 10.1088/0253-6102/71/5/545
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Abstract:
Monogamy and polygamy relations characterize the distributions of entanglement in multipartite systems. We provide classes of monogamy and polygamy inequalities of multiqubit entanglement in terms of concurrence, entanglement of formation, negativity, Tsallis-q entanglement and Rényi-α entanglement, respectively. We show that these inequalities are tighter than the existing ones for some classes of quantum states.