Distributing CV entanglement over 4 co-propagating orthogonal modes

TL;DR

This paper proposes a scheme to distribute continuous variable entanglement among four orthogonal co-propagating optical modes using polarization and angular momentum coupling via a q-plate, with a feasibility analysis confirming entanglement.

Contribution

It introduces a novel method for multi-mode entanglement distribution leveraging polarization and angular momentum coupling with a q-plate.

Findings

The four-mode covariance matrix indicates an entangled multi-mode system.

Feasibility study supports the practical implementation of the scheme.

The scheme extends entanglement distribution capabilities in optical systems.

Abstract

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.