Format

Send to

Choose Destination
Nat Commun. 2012;3:984. doi: 10.1038/ncomms1988.

Imaging high-dimensional spatial entanglement with a camera.

Author information

1
SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, UK. matthew.edgar@glasgow.ac.uk

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.

Supplemental Content

Full text links

Icon for Nature Publishing Group Icon for PubMed Central
Loading ...
Support Center