Tighter Constraints of Multiqubit Entanglement**Supported by the National Natural Science Foundation of China under Grant Nos. 11805143, 11675113, and Key Project of Beijing Municipal Commission of Education under Grant No. KZ201810028042

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.