It has been claimed that ``the use of entangled photons in an imaging system can exhibit effects that cannot be mimicked by any other two-photon source, whatever strength of the correlations between the two photons'' [A. F. Abouraddy, B. E. A. Saleh, A. V. Sergienko, and M. C. Teich, Phys. Rev. Lett. 87, 123602 (2001)]. While we believe that the cited statement is true, we show that the method proposed in that paper, with ``bucket detection'' of one of the photons, will give identical results for entangled states as for appropriately prepared classically correlated states.
@article{arxiv.quant-ph/0211120,
title = {Two-photon imaging and quantum holography},
author = {Gunnar Bjork and Jonas Soderholm and Luis L. Sanchez-Soto},
journal= {arXiv preprint arXiv:quant-ph/0211120},
year = {2007}
}