Imaging high-dimensional spatial entanglement with a camera

Edgar, M.P., Tasca, D.S., Izdebski, F., Warburton, R.E., Leach, J., Agnew, M., Buller, G.S., Boyd, R.W. and Padgett, M.J. (2012) Imaging high-dimensional spatial entanglement with a camera. Nature Communications, 3, 984. (doi: 10.1038/ncomms1988) (PMID:22871804) (PMCID:PMC3432466)

Abstract

The light produced by parametric down-conversion shows strong spatial entanglement that leads to violations of EPR criteria for separability. Historically, such studies have been performed by scanning a single-element, single-photon detector across a detection plane. Here we show that modern electron-multiplying charge-coupled device cameras can measure correlations in both position and momentum across a multi-pixel field of view. This capability allows us to observe entanglement of around 2,500 spatial states and demonstrate Einstein–Podolsky–Rosen type correlations by more than two orders of magnitude. More generally, our work shows that cameras can lead to important new capabilities in quantum optics and quantum information science.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Edgar, Dr Matthew and Tasca, Dr Daniel and Padgett, Professor Miles
• Authors: Edgar, M.P., Tasca, D.S., Izdebski, F., Warburton, R.E., Leach, J., Agnew, M., Buller, G.S., Boyd, R.W., and Padgett, M.J.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Nature Communications
• Publisher: Nature Publishing Group
• ISSN: 2041-1723
• ISSN (Online): 2041-1723
• Copyright Holders: Copyright © 2012 Macmillan Publishers Ltd.
• First Published: First published in Nature Communications 3:984
• Publisher Policy: Reproduced under Creative Commons License