Improved monogamy relations with concurrence of assistance and negativity of assistance for multiqubit W-class states

Zhi-Xiang Jin, Shao-Ming Fei, and Xianqing Li-Jost

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Submission date: 20. Aug. 2018
Pages: 14
published in: Quantum information processing, 17 (2018) 9, art-no. 213 
DOI number (of the published article): 10.1007/s11128-018-1984-9
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Abstract:
Monogamy relations characterize the distributions of entanglement in multipartite systems. We investigate the monogamy relations satisfied by the concurrence of assistance and the negativity of assistance for multiqubit generalized W-class states. Analytical monogamy inequalities are presented for both concurrence of assistance and negativity of assistance, which are shown to be tighter than the existing ones. Detailed examples have been presented.