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Phys. Rev. A 65, 032314 (2002) [11 pages]

Computable measure of entanglement

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G. Vidal
Institut für Theoretische Physik, Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria

R. F. Werner
Institut für Mathematische Physik, TU Braunschweig, Mendelssohnstrasse 3, 38304 Braunschweig, Germany

Received 28 April 2001; published 22 February 2002

We present a measure of entanglement that can be computed effectively for any mixed state of an arbitrary bipartite system. We show that it does not increase under local manipulations of the system, and use it to obtain a bound on the teleportation capacity and on the distillable entanglement of mixed states.


©2002 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.65.032314
DOI: 10.1103/PhysRevA.65.032314
PACS: 03.67.-a, 03.65.-w

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