Strong superadditivity relations for multiqubit systems

• URL: http://arxiv.org/abs/2007.09544v1
• Date: Sun, 19 Jul 2020 00:43:16 GMT
• Title: Strong superadditivity relations for multiqubit systems
• Authors: Xianfei Qi, Ting Gao, Fengli Yan
• Abstract summary: General superadditivity inequalities are presented for multiqubit states. Our result is shown to be tighter than the existing one by a specific example.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We investigate the distributions of quantum coherence characterized by superadditivity relations in multipartite quantum systems. General superadditivity inequalities based on the $\alpha$th ($\alpha\geqslant 1$) power of $l_1$ norm of coherence are presented for multiqubit states, which include the existing ones as special cases. Our result is shown to be tighter than the existing one by a specific example.

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