Properties of entangled photon pairs generated by a CW laser with small coherence time: theory and experiment

Details Properties of entangled photon pairs generated by a CW laser with small coherence time: theory and experiment Properties of entangled photon pairs generated by a CW laser with small coherence time: theory and experiment

2008-02-21

arxiv.org/abs/0802.3131v1

Journal of Modern Optics vol. 56, Issue 2 & 3, pages 215 (2009)

Physics

Quantum Physics

10 pages, 11 figures

Scientific paper

10.1080/09500340802187332

The generation of entangled photon pairs by parametric down--conversion from solid state CW lasers with small coherence time is theoretically and experimentally analyzed. We consider a compact and low-cost setup based on a two-crystal scheme with Type-I phase matching. We study the effect of the pump coherence time over the entangled state visibility and over the violation of Bell's inequality, as a function of the crystals length. The full density matrix is reconstructed by quantum tomography. The proposed theoretical model is verified using a purification protocol based on a compensation crystal.

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