Local versus Global Two-Photon Interference in Quantum Networks
Abstract
We devise an approach to characterizing the intricate interplay between classical and quantum interference of two-photon states in a network, which comprises multiple time-bin modes. By controlling the phases of delocalized single photons, we manipulate the global mode structure, resulting in distinct two-photon interference phenomena for time-bin resolved (local) and time-bucket (global) coincidence detection. This coherent control over the photons' mode structure allows for synthesizing two-photon interference patterns, where local measurements yield standard Hong-Ou-Mandel dips while the global two-photon visibility is governed by the overlap of the delocalized single-photon states. Thus, our experiment introduces a method for engineering distributed quantum interferences in networks.
Cite
@article{arxiv.2005.07219,
title = {Local versus Global Two-Photon Interference in Quantum Networks},
author = {Thomas Nitsche and Syamsundar De and Sonja Barkhofen and Evan Meyer-Scott and Johannes Tiedau and Jan Sperling and Aurél Gábris and Igor Jex and Christine Silberhorn},
journal= {arXiv preprint arXiv:2005.07219},
year = {2020}
}