Entanglement of arbitrary superpositions of modes within two-dimensional orbital angular momentum state spaces

Jack, B., Yao, A.M., Leach, J., Romero, J., Franke-Arnold, S., Ireland, D.G., Barnett, S.M. and Padgett, M.J. (2010) Entanglement of arbitrary superpositions of modes within two-dimensional orbital angular momentum state spaces. Physical Review A: Atomic, Molecular and Optical Physics, 81(4), 043844. (doi:10.1103/PhysRevA.81.043844)

Full text not currently available from Enlighten.

Abstract

We use spatial light modulators (SLMs) to measure correlations between arbitrary superpositions of orbital angular momentum (OAM) states generated by spontaneous parametric down-conversion. Our technique allows us to fully access a two-dimensional OAM subspace described by a Bloch sphere, within the higher-dimensional OAM Hilbert space. We quantify the entanglement through violations of a Bell-type inequality for pairs of modal superpositions that lie on equatorial, polar, and arbitrary great circles of the Bloch sphere. Our work shows that SLMs can be used to measure arbitrary spatial states with a fidelity sufficient for appropriate quantum information processing systems.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Padgett, Professor Miles and Barnett, Professor Stephen and Ireland, Professor David and Franke-Arnold, Dr Sonja and Romero, Dr Mary and Leach, Mr Jonathan
Authors: Jack, B., Yao, A.M., Leach, J., Romero, J., Franke-Arnold, S., Ireland, D.G., Barnett, S.M., and Padgett, M.J.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review A: Atomic, Molecular and Optical Physics
Publisher:American Physical Society
ISSN:1050-2947
ISSN (Online):1094-1622
Published Online:30 April 2010

University Staff: Request a correction | Enlighten Editors: Update this record

Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
474271Full-field quantum imagingMiles PadgettEngineering & Physical Sciences Research Council (EPSRC)EP/G011656/1Physics and Astronomy