Unification of multi-qubit polygamy inequalities

Details Unification of multi-qubit polygamy inequalities Unification of multi-qubit polygamy inequalities

2012-04-02

arxiv.org/abs/1204.0293v1

Physical Review A 85, 032335 (2012)

Physics

Quantum Physics

8 pages, 2 figures

Scientific paper

10.1103/PhysRevA.85.032335

We establish a unified view of polygamy of multi-qubit entanglement. We first introduce a two-parameter generalization of entanglement of assistance namely unified entanglement of assistance for bipartite quantum states, and provide an analytic lowerbound in two-qubit systems. We show a broad class of polygamy inequalities of multi-qubit entanglement in terms of unified entanglement of assistance that encapsulates all known multi-qubit polygamy inequalities as special cases. We further show that this class of polygamy inequalities can be improved into tighter inequalities for three-qubit systems.

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