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Opt Express. 2009 May 11;17(10):8287-93.

Violation of a Bell inequality in two-dimensional orbital angular momentum state-spaces.

Author information

1
Department of Physics and Astronomy, SUPA, University of Glasgow, Glasgow, UK. j.leach@physics.gla.ac.uk

Abstract

We observe entanglement between photons in controlled super-position states of orbital angular momentum (OAM). By drawing a direct analogy between OAM and polarization states of light, we demonstrate the entangled nature of high order OAM states generated by spontaneous downconversion through violation of a suitable Clauser Horne Shimony Holt (CHSH)-Bell inequality. We demonstrate this violation in a number of two-dimensional subspaces of the higher dimensional OAM Hilbert space.

PMID:
19434161
DOI:
10.1364/oe.17.008287
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