Generation and Characterization of Werner States and Maximally Entangled Mixed States by a Universal Source of Entanglement
Marco Barbieri, F. De Martini, G. Di Nepi, Paolo Mataloni · Physical Review Letters · 2004
We present a novel technique for generating two-photon polarization mixed states of any structure, which is based on the peculiar spatial characteristics of a high brilliance source of entangled pairs. Werner states and maximally entangled mixed states, two well-known families of mixed states important for quantum information, have been created and fully characterized by this technique. We have also investigated and tested the nonlocal properties of these states.