Constraining the Correlation Distance in Quantum Measurements

TL;DR

This paper discusses extending quantum entanglement correlation measurements to the Earth-Moon distance, proposing a lunar experiment to test quantum physics over unprecedented scales and potentially distinguish between different theories.

Contribution

It proposes a feasible experiment to extend quantum correlation tests to lunar distances, aiming to explore new regimes of quantum physics and compare standard and alternative theories.

Findings

Current experiments reach 18 km with picosecond resolution

Proposed lunar experiment could extend correlation distance by 10,000 times

Potential to discriminate between standard quantum physics and Bohmian theory

Abstract

Standard Quantum Physics states that the outcome of measurements for some distant entangled subsystems are instantaneously statistically correlated, whatever their mutual distance. This correlation presents itself as if there were a correlation at a distance with infinite speed. It is expressed by the Bell Theorem. It has been experimentally verified over distances up to 18 km with a time resolution of a few picosecond, which can be translated into an apparent effective correlation speed larger than 10^7 c. The purpose of the present White Paper is to discuss the scientific interest and the feasibility to extend the correlation distance up to the Earth-Moon distance, i.e. 2 10^4 times larger than in present experiments. We are thus led to propose to install on the Moon a polarimter and a high performance photon detector with a high temporal resolution. Such an exploratory experiment would provide new tests of Quantum Physics and could perhaps discriminate between standard Quantum Physics and for instance the Bohmian theory.