N00N states from a single non-linear directional coupler
Abstract
In the quest for applicable quantum information technology miniaturised, compact and scalable sources are of paramount importance. Here, we present the concept for the generation of 2-photon N00N states without further post-processing in a single non-linear optical element. Based upon a periodically poled waveguide coupler, we present the principle of state generation via type-0 parametric down-conversion inside this type of devices. With the eigenmode description of the linear optical element, we utilise the delocalised photon pair generation to generate a N00N state in the measurement basis. We show, that we are able to eliminate the need for narrow-band spectral filtering, as well as for phase-stabilisation of the pump light, making this approach an elegant way to produce 2-photon N00N states.
Cite
@article{arxiv.1412.0448,
title = {N00N states from a single non-linear directional coupler},
author = {Regina Kruse and Linda Sansoni and Sebastian Brauner and Raimund Ricken and Craig S. Hamilton and Igor Jex and Christine Silberhorn},
journal= {arXiv preprint arXiv:1412.0448},
year = {2014}
}
Comments
5 pages, 4 figures