Work

The cosmological constant problem and the effective potential of a gravity-coupled scalar

Year: 2024

Type: article

Abstract: A bstract We consider a quantum scalar field in a classical (Euclidean) De Sitter background, whose radius is fixed dynamically by Einstein’s equations. In the case of a free scalar, it has been shown by Becker and Reuter that if one regulates the quantum effective action by putting a cutoff N on the modes of the quantum field, the radius is driven dynamically to infinity when N tends to infinity. We show that this result holds also in the case of a self-interacting scalar, both in the symmetric and broken-symmetry phase. Furthermore, when the gravitational background is put on shell, the quantum corrections to the mass and quartic self-coupling are found to be finite.

Source: Journal of High Energy Physics

DOI: 10.1007/jhep09(2024)074

Authors: Renata Ferrero, Roberto Percacci

Institutions: Friedrich-Alexander-Universität Erlangen-Nürnberg, Scuola Internazionale Superiore di Studi Avanzati, Istituto Nazionale di Fisica Nucleare, Sezione di Trieste

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

OpenAlex ID: W4402601463

FWCI: 1.145

Cites: 22

Cited by: 6

Related to: 10