Berlin 2005 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 33: Quantenkommunikation II

Q 33.1: Vortrag

Dienstag, 8. März 2005, 10:45–11:00, HU Audimax

Angular EPR paradox — •Jörg B Götte, Sonja Franke-Arnold, and Stephen M Barnett — University of Strathclyde, Department of Physics, 107 Rottenrow, G4 0NG Glasgow, United Kingdom

Orbital angular momentum [OAM] of light provides a multidimensional optical system suitable for quantum communication. Entanglement is the basis of most applications in the field of quantum information. In this context it would be desirable to demonstrate the EPR paradox for the conjugate variables of OAM and azimuthal position. We discuss quantum correlations in these variables for photon pairs created in a parametric down conversion. Modelling the measurement of OAM and azimuthal position of photons on previous experimental work in this field, we are able to propose an experimentally feasible criterion for the demonstration of an angular EPR paradox, which includes a description for the indeterminacies inherent to the measurement process. We discuss the effects of these uncertainties to the proposed criterion.