Tuesday, February 5, 2013

1302.0156 (Jan Perina Jr et al.)

State reconstruction of a multimode twin beam using photodetection    [PDF]

Jan Perina Jr, Ondrej Haderka, Vaclav Michalek, Martin Hamar
Robust and reliable method for reconstructing quasi-distributions of integrated intensities of twin beams generated in spontaneous parametric down-conversion and entangled in photon numbers is suggested. It utilizes the first and second photocount moments and minimizes the declination from experimental photocount histograms. Qualitatively different forms of quasi-distributions for quantum and classical states are suggested in the method. The transition from quantum to classical states caused by an increased detection noise is discussed. Momentum criterion for non-classicality of twin beams is suggested.
View original: http://arxiv.org/abs/1302.0156

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