Optical interferometry has been a long-standing setup for characterization of quantum states of light. Both the linear and the nonlinear interferences can provide information about the light statistics an underlying detail of the light-matter interactions. Here we demonstrate how interferometric detection of nonlinear spectroscopic signals may be used to improve the measurement accuracy of matter susceptibilities. Light-matter interactions change the photon statistics of quantum light, which are encoded in the field correlation functions. Application is made to the Hong-Ou-Mandel two-photon interferometer that reveals entanglement-enhanced resolution that can be achieved with existing optical technology.
@article{arxiv.2103.02409,
title = {Hong-Ou-Mandel interferometry and spectroscopy using entangled photons},
author = {Konstantin E. Dorfman and Shahaf Asban and Bing Gu and Shaul Mukamel},
journal= {arXiv preprint arXiv:2103.02409},
year = {2021}
}