Modified two-photon interference achieved by the manipulation of entanglement
Polina R. Sharapova, Kai-Hong Luo, H. Herrmann, Matthias Reichelt, Christine Silberhorn, T. Meier · Physical Review A · 2017
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 antibunching 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 ${\mathrm{LiNbO}}_{3}$ platform.