Violation of a Bell Inequality in two-Dimensional Orbital Angular Momentum State-Spaces

J. Leach, B. Jack, J. Romero, M. Ritsch-Marte, R. W. Boyd, A. K. Jha, S. M. Barnett, S. Franke-Arnold, and M. J. Padgett, Opt. Express 17, 8287 (2009).

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