Entanglement correlations, Bell inequalities, and the concurrence

Abstract

Probabilities of measurement outcomes of two-particle entangled states give a physically transparent interpretation of the concurrence and of the I-concurrence as entanglement measures. The (I)-concurrence can thus be measured experimentally. The tight connection between these measures and Bell inequalities is highlighted.Comment: Updated version of quant-ph/0110139, with extension to mixed states. To appear in Phys. Lett.