High-dimensional quantum nature of ghost angular Young's diffraction

Chen, L., Leach, J., Jack, B., Padgett, M. J., Franke-Arnold, S. and She, W. (2010) High-dimensional quantum nature of ghost angular Young's diffraction. Physical Review A: Atomic, Molecular and Optical Physics, 82(3), 033822. (doi:10.1103/PhysRevA.82.033822)

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Publisher's URL: http://dx.doi.org/10.1103/PhysRevA.82.033822

Abstract

We propose a technique to characterize the dimensionality of entangled sources affected by any environment, including phase and amplitude masks or atmospheric turbulence. We illustrate this technique on the example of angular ghost diffraction using the orbital angular momentum (OAM) spectrum generated by a nonlocal double slit. We realize a nonlocal angular double slit by placing single angular slits in the paths of the signal and idler modes of the entangled light field generated by parametric down-conversion. Based on the observed OAM spectrum and the measured Shannon dimensionality spectrum of the possible quantum channels that contribute to Young’s ghost diffraction, we calculate the associated dimensionality Dtotal. The measured Dtotal ranges between 1 and 2.74 depending on the opening angle of the angular slits. The ability to quantify the nature of high-dimensional entanglement is vital when considering quantum information protocols.

Item Type:Articles
Additional Information:Article
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Padgett, Professor Miles and Franke-Arnold, Dr Sonja and Leach, Mr Jonathan
Authors: Chen, L., Leach, J., Jack, B., Padgett, M. J., Franke-Arnold, S., and She, W.
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

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