Roofs and Convexity

Published 16 Aug 2011 in quant-ph, math-ph, and math.MP | (1108.3218v1)

Abstract: Convex roof extensions are widely used to create entanglement measures in quantum information theory. The aim of the article is to present some tools which could be helpful for their treatment. Sections 2 and 3 introduce into the subject. It follows descriptions of Wootter's method, of the "subtraction procedure", and examples on how to use symmetries.

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Armin Uhlmann

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