Bound of entanglement of assistance and monogamy constraints
Zong-Guo Li, Shao-Ming Fei, Sergio A Albeverio, Wan-Yu Liu · Physical Review A · 2009
We investigate the entanglement of assistance which quantifies capabilities of producing pure bipartite entangled states from a pure tripartite state. The lower bound and upper bound of entanglement of assistance are obtained. In the light of the upper bound, monogamy constraints are proved for arbitrary $n$-qubit states.