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Conditional Entanglement

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arxiv quant-ph/0701149 v3 pith:OEUSPY2O submitted 2007-01-21 quant-ph

Conditional Entanglement

classification quant-ph
keywords measuresentanglementbuiltconditionalmeasurequantumadditiveapproach
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Based on the ideas of {\it quantum extension} and {\it quantum conditioning}, we propose a generic approach to construct a new kind of entanglement measures called {\it conditional entanglement}. The new measures, built from the known entanglement measures, are convex, automatically {\it super-additive}, and even smaller than the regularized versions of the generating measures. More importantly, new measures can also be built directly from measures of correlations, enabling us to introduce an {\it additive} measure and generalize it to a multipartite entanglement measure.

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