Quantum correlation tests at cosmic distances

TL;DR

This paper explores the feasibility of testing quantum entanglement correlations over cosmic distances, specifically between Earth and the Moon, to better understand quantum physics and challenge alternative theories.

Contribution

It proposes a novel experimental setup to extend quantum correlation tests from 1200 km to 390,000 km, including placing a polarimeter on the Moon.

Findings

Feasibility of extending quantum correlation tests to lunar distances.

Potential to impose stricter constraints on alternative quantum theories.

Discussion of violating Bell inequalities beyond Earth-Moon distance.

Abstract

It is commonly accepted that the results of measurements simultaneously realized over two entangled subsystems are statistically correlated instantaneously regardless of the distance between them. In accordance with Bell theorem, everything happens in such measurements as if there was a correlation propagating at infinite speed between the two subsystems.These correlations have been so far verified experimentally up to a distance of 1200 km. We discuss the interest and feasibility of extending this distance to 390,000 km, thus gaining a factor of 300. The idea is to install one of the polarimeters on the Moon, with the other on Earth. Such an experiment would provide a new test of Quantum Physics and allow to put higher constraints on alternative theories and interpretations. We also discuss the possibility to violate Bell inequalities beyond Earth-Moon distance.