Quantum fields and the cosmological constant
High Energy Physics - Theory
2025-04-01 v2 General Relativity and Quantum Cosmology
Abstract
It has been shown that if one solves self-consistently the semiclassical Einstein equations in the presence of a quantum scalar field, with a cutoff on the number of modes, spacetime become flatter when the cutoff increases. Here we extend the result to include the effect of fields with spin 0, 1/2, 1 and 2. With minor adjustments, the main result persists. Remarkably, one can have positive curvature even if the cosmological constant in the bare action is negative.
Cite
@article{arxiv.2503.17203,
title = {Quantum fields and the cosmological constant},
author = {Renata Ferrero and Vincenzo Naso and Roberto Percacci},
journal= {arXiv preprint arXiv:2503.17203},
year = {2025}
}
Comments
17 pages