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

Leach, J., Jack, B., Romero, J., Ritsch-Marte, M., Boyd, R.W., Jha, A.K., Barnett, S.M., Franke-Arnold, S. and Padgett, M.J. (2009) Violation of a Bell inequality in two-dimensional orbital angular momentum state-spaces. Optics Express, 17(10), pp. 8287-8293. (doi: 10.1364/OE.17.008287) (PMID:19434161)

Abstract

We observe entanglement between photons in controlled superposition 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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Padgett, Professor Miles and Franke-Arnold, Professor Sonja and Romero, Dr Jacqui
• Authors: Leach, J., Jack, B., Romero, J., Ritsch-Marte, M., Boyd, R.W., Jha, A.K., Barnett, S.M., Franke-Arnold, S., and Padgett, M.J.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Optics Express
• Publisher: Optical Society of America
• ISSN: 1094-4087
• ISSN (Online): 1094-4087
• Copyright Holders: Copyright © 2009 Optical Society of America
• First Published: First published in Optics Express 17(10):8287-8293
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
47427	1	Full-field quantum imaging	Miles Padgett	Engineering & Physical Sciences Research Council (EPSRC)	EP/G011656/1	Physics and Astronomy