Imaging Bell-type nonlocal behaviour

Moreau, P.-A. , Toninelli, E., Gregory, T., Aspden, R. S., Morris, P. A. and Padgett, M. J. (2019) Imaging Bell-type nonlocal behaviour. Science Advances, 5(7), eaaw2563. (doi: 10.1126/sciadv.aaw2563)

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The violation of a Bell inequality not only attests to the nonclassical nature of a system but also holds a very unique status within the quantum world. The amount by which the inequality is violated often provides a good benchmark on how a quantum protocol will perform. Acquiring images of such a fundamental quantum effect is a demonstration that images can capture and exploit the essence of the quantum world. Here, we report an experiment demonstrating the violation of a Bell inequality within observed images. It is based on acquiring full-field coincidence images of a phase object probed by photons from an entangled pair source. The image exhibits a violation of a Bell inequality with S = 2.44 ± 0.04. This result both opens the way to new quantum imaging schemes based on the violation of a Bell inequality and suggests promise for quantum information schemes based on spatial variables.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Padgett, Professor Miles and Aspden, Mr Reuben and Moreau, Dr Paul-Antoine and Gregory, Dr Thomas and Toninelli, Mr Ermes and MORRIS, PETER
Authors: Moreau, P.-A., Toninelli, E., Gregory, T., Aspden, R. S., Morris, P. A., and Padgett, M. J.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Science Advances
Publisher:American Association for the Advancement of Science
ISSN (Online):2375-2548
Published Online:12 July 2019
Copyright Holders:Copyright © 2019 The Authors
First Published:First published in Science Reports 5(7):eaaw2563
Publisher Policy:Reproduced under a Creative Commons license

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
717951IMAGITMiles PadgettEuropean Commission (EC)706410S&E P&A - PHYSICS & ASTRONOMY
726501Field testing a miniaturised MEMS gravimeterGiles HammondEngineering and Physical Sciences Research Council (EPSRC)EP/M01326X1S&E P&A - PHYSICS & ASTRONOMY
624501TWISTS - Twists & more: the complex shape of lightMiles PadgettEuropean Research Council (ERC)340507S&E P&A - PHYSICS & ASTRONOMY
3032890Quantum technologies in high dimensionPaul-Antoine MoreauLeverhulme Trust (LEVERHUL)ECF-2018-634P&S - Physics & Astronomy