6533b85bfe1ef96bd12bbf6c

RESEARCH PRODUCT

Bounds on bipartite entanglement from fixed marginals

Giuseppe BaioDariusz ChruscinskiPawel HorodeckiAntonino MessinaGniewomir Sarbicki

subject

Quantum PhysicsFOS: Physical sciencesQuantum PhysicsQuantum Physics (quant-ph)

description

We discuss the problem of characterizing upper bounds on entanglement in a bipartite quantum system when only the reduced density matrices (marginals) are known. In particular, starting from the known two-qubit case, we propose a family of candidates for maximally entangled mixed states with respect to fixed marginals for two qudits. Interestingly, it turns out such states are always quasidistillable. Moreover, they are extremal in the convex set of two qudit states with fixed marginals. Our observations are supported by numerical analysis.

yearjournalcountryeditionlanguage
2019-04-16
10.1103/physreva.99.062312http://arxiv.org/abs/1904.07650