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Entangled mixed-state generation by twin-photon scattering

We report experimental results on mixed-state generation by multiple scattering of polarization-entangled photon pairs created from parametric down-conversion. By using a large variety of scattering optical systems we have experimentally obtained entangled mixed states that lie upon and below the Werner curve in the linear entropy-tangle plane. We have also introduced a simple phenomenological model built on the analogy between classical polarization optics and quantum maps. Theoretical predictions from such model are in full agreement with our experimental findings.

preprint2006arXivOpen access
G. PuentesD. VoigtA. AielloJ. P. Woerdman
quant-ph
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Open access4 authors1 topic
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G. PuentesD. VoigtA. AielloJ. P. Woerdman

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