Macroscopically nonlocal quantum correlations
Quantum Physics
2021-09-22 v2
Abstract
It is usually believed that coarse-graining of quantum correlations leads to classical correlations in the macroscopic limit. Such a principle, known as macroscopic locality, has been proved for correlations arising from independent and identically distributed (IID) entangled pairs. In this letter we consider the generic (non-IID) scenario. We find that the Hilbert space structure of quantum theory can be preserved in the macroscopic limit. This leads directly to a Bell violation for coarse-grained collective measurements, thus breaking the principle of macroscopic locality.
Cite
@article{arxiv.2104.03988,
title = {Macroscopically nonlocal quantum correlations},
author = {Miguel Gallego and Borivoje Dakić},
journal= {arXiv preprint arXiv:2104.03988},
year = {2021}
}
Comments
12 pages, 1 figure