Quantum Fields and the Cosmological Constant
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
- Roberto Percacci (ORCID: https://orcid.org/0000-0002-3355-331X)
- Renata Ferrero (ORCID: https://orcid.org/0000-0003-0613-1274)
- Vincenzo Naso
Institutions
- Scuola Internazionale Superiore di Studi Avanzati (IT)
- Friedrich-Alexander-Universität Erlangen-Nürnberg (DE)
- Istituto Nazionale di Fisica Nucleare, Sezione di Trieste (IT)
Publication Details
- Journal
- Universe
- Published
- 2025-05-28
- DOI
- https://doi.org/10.3390/universe11060173
- Primary Topic
- Cosmology and Gravitation Theories
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Simons Foundation
- Government of Canada
- Institut Périmètre de physique théorique
- Ministry of Colleges and Universities