Bounds for Entanglement via an Extension of Strong Subadditivity of Entropy

Details Bounds for Entanglement via an Extension of Strong Subadditivity of Entropy Bounds for Entanglement via an Extension of Strong Subadditivity of Entropy

2012-03-21

arxiv.org/abs/1203.4719v2

Physics

Quantum Physics

8 pages. Version 2 includes some additional references and comments

Scientific paper

We prove lower bounds for the entanglement of formation and the squashed
entanglement for any a bipartite density matrix in terms of the conditional
entropy of the bipartite state with respect to either of its partial traces,
and prove that these bounds are sharp by constructing a new class of states
whose entanglements can be computed, and for which the bounds are saturated.

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