Long-range enhanced mutual information from inflation
Abstract
The quantum origin of cosmological primordial perturbations is a cornerstone framework in the interplay between gravity and quantum physics. In this paper we study the mutual information between two spatial regions in a radiation-dominated universe filled by a curvature perturbation field in a squeezed state. We find an enhancement with respect to the usual mutual information of the Minkowski vacuum due to momentum modes affected by particle production during inflation. This result supports our previous claim of the existence of long-range correlations between Primordial Black Holes (PBH) at formation during the radiation era.
Keywords
Cite
@article{arxiv.2007.02828,
title = {Long-range enhanced mutual information from inflation},
author = {Llorenç Espinosa-Portalés and Juan García-Bellido},
journal= {arXiv preprint arXiv:2007.02828},
year = {2021}
}
Comments
16 pages, 3 figures. New results include additional enhancement of the mutual information during the radiation era. Typos corrected; section III extended; appendix, references and comments added. Matches version accepted by PRD