Obstructions to Bell CMB Experiments
Cosmology and Nongalactic Astrophysics
2019-10-22 v6 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Quantum Physics
Abstract
We present a general and systematic study of how a Bell experiment on the cosmic microwave background could be carried out. We introduce different classes of pseudo-spin operators and show that, if the system is placed in a two-mode squeezed state as inflation predicts, they all lead to a violation of the Bell inequality. However, we also discuss the obstacles that one faces in order to realize this program in practice and show that they are probably insurmountable. We suggest alternative methods that would reveal the quantum origin of cosmological structures without relying on Bell experiments.
Cite
@article{arxiv.1706.05001,
title = {Obstructions to Bell CMB Experiments},
author = {Jerome Martin and Vincent Vennin},
journal= {arXiv preprint arXiv:1706.05001},
year = {2019}
}
Comments
typo in equation (3) corrected