In this theoretical study we demonstrate that entangled states are able to significantly extend the functionality of Hong-Ou-Mandel (HOM) interferometers. By generating a coherent superposition of parametric-down-conversion photons and spatial entanglement in the input channel, the coincidence probability measured at the output changes from a typical HOM-type dip (photon bunching) into much richer patterns including an anti-bunching peak and rapid oscillation fringes with twice the optical frequency. The considered system should be realizable on a single chip using current waveguide technology in the LiNbO3 platform.
@article{arxiv.1706.02871,
title = {Modified Two-Photon Interference Achieved by the Manipulation of Entanglement},
author = {P. R. Sharapova and K. H. Luo and H. Herrmann and M. Reichelt and C. Silberhorn and T. Meier},
journal= {arXiv preprint arXiv:1706.02871},
year = {2018}
}