Bounds and optimisation of orbital angular momentum bandwidths within parametric down-conversion systems |
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| Authors: | F. M. Miatto D. Giovannini J. Romero S. Franke-Arnold S. M. Barnett M. J. Padgett |
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| Affiliation: | 1. SUPA and Department of Physics, University of Strathclyde, G4 0NG, Glasgow, UK
2. School of Physics and Astronomy, SUPA, University of Glasgow, G12 8QQ, Glasgow, UK
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| 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. |
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