We propose a scheme for distributing continuous variable entanglement originally established among a pair of mode between a set of four orthogonal co-propagating modes. This is accomplished by exploiting the possibility of coupling polarization with optical angular momentum provided by the q-plate. Here we present the principle of the proposed scheme with a short feasibility study that shows that the four-modes covariance matrix at the scheme output represent an entangled multi mode system.
Cite
@article{arxiv.1811.08388,
title = {Distributing CV entanglement over 4 co-propagating orthogonal modes},
author = {A. Pecoraro and A. Porzio},
journal= {arXiv preprint arXiv:1811.08388},
year = {2018}
}