Chirped-pulse interferometry (CPI) captures the metrological advantages of quantum Hong-Ou-Mandel (HOM) interferometry in a completely classical system. Modified HOM interferometers are the basis for a number of seminal quantum-interference effects. Here, the corresponding modifications to CPI allow for the first observation of classical analogues to the HOM peak and quantum beating. They also allow a new classical technique for generating phase super-resolution exhibiting a coherence length dramatically longer than that of the laser light, analogous to increased two-photon coherence lengths in entangled states.
@article{arxiv.0909.0792,
title = {Classical analogues of two-photon quantum interference},
author = {Rainer Kaltenbaek and Jonathan Lavoie and Kevin J. Resch},
journal= {arXiv preprint arXiv:0909.0792},
year = {2009}
}