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Phys Rev Lett. 2005 Feb 18;94(6):063601. Epub 2005 Feb 16.

Two-photon imaging with thermal light.

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Department of Physics, University of Maryland, Baltimore County, Baltimore, Maryland 21250, USA.


We report the first experimental demonstration of two-photon imaging with a pseudothermal source. Similarly to the case of entangled states, a two-photon Gaussian thin lens equation is observed, indicating EPR type correlation in position. We introduce the concepts of two-photon coherent and two-photon incoherent imaging. The differences between the entangled and the thermal cases are explained in terms of these concepts.

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