# Measurements of entanglement over a kilometric distance to test superluminal models of Quantum Mechanics: preliminary results

## TL;DR

This paper reports on a new experiment measuring quantum entanglement over long distances to test superluminal communication models, aiming to detect deviations from standard quantum mechanics predictions.

## Contribution

It introduces a novel experimental setup that extends the distance for entanglement measurements and increases the sensitivity to superluminal velocities, providing preliminary results.

## Key findings

- No deviations from quantum mechanics observed yet
- Set new lower bounds for superluminal velocities
- Enhanced experimental methods for testing non-locality

## Abstract

As shown in the \emph{EPR} paper (Einstein, Podolsky e Rosen, 1935), Quantum Mechanics is a non-local Theory. The Bell theorem and the successive experiments ruled out the possibility of explaining quantum correlations using only local hidden variables models. Some authors suggested that quantum correlations could be due to superluminal communications that propagate isotropically with velocity \emph{$v_{t}>c$} in a preferred reference frame. For finite values of \emph{$v_{t}$} and in some special cases, Quantum Mechanics and superluminal models lead to different predictions. So far, no deviations from the predictions of Quantum Mechanics have been detected and only lower bounds for the superluminal velocities \emph{$v_{t}$} have been established. Here we describe a new experiment that increases the maximum detectable superluminal velocities and we give some preliminary results.