Abstract
Superadditivity relations characterize the distributions of coherence in multipartite quantum systems. In this work, we investigate superadditivity relations related to the l1 norm of coherence $$\mathcal {C}_{l_{1}}$$ . Superadditivity relations for the αth power of $$\mathcal {C}_{l_{1}}$$ have also been derived, which are gradually tighter for every multiqubit states.
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