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Spatial antibunching of photons with parametric down-conversion

W. A. T. Nogueira, S. P. Walborn, S. Padua, C. H. Monken

quant-pharXiv:quant-ph/0206038

Abstract

The theoretical framework behind a recent experiment by Nogueira et. al. [Phys. Rev. Lett. 86, 4009 (2001)] of spatial antibunching in a two-photon state generated by collinear type II parametric down-conversion and a birefringent double-slit is presented. The fourth-order quantum correlation function is evaluated and shown to violate the classical Schwarz-type inequality, ensuring that the field does not have a classical analog. We expect these results to be useful in the rapidly growing fields of quantum imaging and quantum information.

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