Entangled mixed-state generation by twin-photon scattering

Abstract

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.

6 pages, 4 figures

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• Indistinguishability-enhanced entanglement recovery by spatially localized operations and classical communication
• Entanglement Dynamics in the Presence of Controlled Unital Noise
• Nonlocal biphoton generation in Werner state from a single semiconductor quantum dot
• Towards quantum optics and entanglement with electron spin ensembles in semiconductors
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