Friday, April 6, 2012

1204.1293 (Matthew P. Edgar et al.)

Observation of Einstein-Podolsky-Rosen type correlations with an
electron multiplying CCD camera
   [PDF]

Matthew P. Edgar, Daniel S. Tasca, Frauke Izdebski, Ryan E. Warburton, Jonathan Leach, Megan Agnew, Gerald S. Buller, Robert W. Boyd, Miles J. Padgett
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 CCD 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 2500 spatial states and demonstrate EPR-type correlations by more than two orders of magnitude. More generally, our work shows that such cameras can lead to important new capabilities in quantum optics and quantum information science.
View original: http://arxiv.org/abs/1204.1293

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