Azimuthal distinguishability of entangled photons generated in spontaneous parametric down-conversion

Details Azimuthal distinguishability of entangled photons generated in spontaneous parametric down-conversion Azimuthal distinguishability of entangled photons generated in spontaneous parametric down-conversion

2007-09-21

arxiv.org/abs/0709.3437v1

C. I. Osorio, G. Molina-Terriza, B. G. Font, and J. P. Torres. Opt. Express 15, 14636-14643 (2007)

Physics

Quantum Physics

7 pages, 5 figures, submitted to Opt. Express

Scientific paper

10.1364/OE.15.014636

We experimentally demonstrate that paired photons generated in different sections of a down-conversion cone, when some of the interacting waves show Poynting vector walk-off, carry different spatial correlations, and therefore a different degree of spatial entanglement. This is shown to be in agreement with theoretical results. We also discuss how this azimuthal distinguishing information of the down-conversion cone is relevant for the implementation of quantum sources aimed at the generation of entanglement in other degrees of freedom, such as polarization.

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