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

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 violat...

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Bibliographic Details
Published in:	Optics express Vol. 17; no. 10; pp. 8287 - 8293
Main Authors:	Leach, J, Jack, B, Romero, J, Ritsch-Marte, M, Boyd, R W, Jha, A K, Barnett, S M, Franke-Arnold, S, Padgett, M J
Format:	Journal Article
Language:	English
Published:	United States 11-05-2009
Online Access:	Get full text
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Summary:	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.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1094-4087 1094-4087
DOI:	10.1364/oe.17.008287