We report the first experimental demonstration of two-photon imaging with a pseudo-thermal 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.
@article{arxiv.quant-ph/0408001,
title = {Two-photon "ghost" imaging with thermal light},
author = {Alejandra Valencia and Giuliano Scarcelli and Milena D'Angelo and Y. Shih},
journal= {arXiv preprint arXiv:quant-ph/0408001},
year = {2009}
}