Eur. Phys. J. D (2012) 66: 192
https://doi.org/10.1140/epjd/e2012-20695-2

Regular Article

Towards the evidence of a purely spatial Einstein-Podolsky-Rosen paradox in images: measurement scheme and first experimental results

Département d’Optique P.M. Duffieux, Institut FEMTO-ST, UMR CNRS 6174, Université de Franche-Comté, 16 route de Gray, 25030 Besançon Cedex, France

^a e-mail: elantz@univ-fcomte.fr

Received: 30 November 2011
Received in final form: 9 March 2012
Published online: 20 July 2012

Abstract

We propose a scheme to evidence the Einstein-Podolsky-Rosen (EPR) paradox for photons produced by spontaneous down conversion, from measurement of purely spatial correlations of photon positions both in the near- and in the far-field. Experimentally, quantum correlations have been measured in the far-field of parametric fluorescence created in a type II BBO crystal. Imaging is performed in the photon counting regime with an electron-multiplying CCD (EMCCD) camera.