Determining the dimensionality of bipartite orbital-angular-momentum entanglement using multi-sector phase masks

Giovannini, D. and Miatto, F. M. and Romero, J. and Barnett, S. M. and Woerdman, J. P. and Padgett, M. J. (2012) Determining the dimensionality of bipartite orbital-angular-momentum entanglement using multi-sector phase masks. New Journal of Physics, 14 (7). 073046. ISSN 1367-2630

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    Abstract

    The Shannon dimensionality of orbital-angular-momentum (OAM) entanglement produced in spontaneous parametric down-conversion can be probed by using multi-sector phase analysers [1]. We demonstrate a spatial light modulator-based implementation of these analysers, and use it to measure a Schmidt number of about 50.