Azimuthal distinguishability of entangled photons generated in spontaneous parametric down-conversion
arXiv:0709.3437 · doi:10.1364/OE.15.014636
Abstract
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.
arXiv comment7 pages, 5 figures, submitted to Opt. Express
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- Measuring different types of transverse momentum correlations in the biphoton's Fourier plane
- A novel method to investigate how the spatial correlation of the pump beam affects the purity of polarization entangled states
- Generation of perfect vortex of variable size and its effect in angular spectrum of the down-converted photons