Quantum Fields and the Cosmological Constant

Ferrero R, Naso V, Percacci R (2025)

Publication Type: Journal article

Publication year: 2025

Journal

Universe MDPI

Book Volume: 11

Article Number: 173

Journal Issue: 6

DOI: 10.3390/universe11060173

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.

Authors with CRIS profile

Renata Ferrero Chair for Theoretical Physics III (Quantum Gravity)

Involved external institutions

Scuola Internazionale Superiore di Studi Avanzati (SISSA) IT Italy (IT)

How to cite

APA:

Ferrero, R., Naso, V., & Percacci, R. (2025). Quantum Fields and the Cosmological Constant. Universe, 11(6). https://doi.org/10.3390/universe11060173

MLA:

Ferrero, Renata, Vincenzo Naso, and Roberto Percacci. "Quantum Fields and the Cosmological Constant." Universe 11.6 (2025).

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