Phys. Rev. Lett. 95, 210501 (2005) [4 pages]Entanglement of Formation of Bipartite Quantum StatesReceived 16 July 2005; published 15 November 2005 We give an explicit tight lower bound for the entanglement of formation for arbitrary bipartite mixed states by using the convex hull construction of a certain function. This is achieved by revealing a novel connection among the entanglement of formation, the well-known Peres-Horodecki, and realignment criteria. The bound gives a quite simple and efficiently computable way to evaluate quantitatively the degree of entanglement for any bipartite quantum state. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.210501
DOI:
10.1103/PhysRevLett.95.210501
PACS:
03.67.Mn, 03.65.Ud, 89.70.+c
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