Work

Unruh-DeWitt particle detectors in bouncing cosmologies

Year: 2024

Type: article

Abstract: We study semi-classical particle production in non-singular bouncing cosmologies by employing the Unruh-DeWitt model of a particle detector propagating in this class of spacetimes. The scale factor for the bouncing cosmology is derived analytically and is inspired by the modified Friedmann equation employed in the loop quantum cosmology literature. We examine how the detector response varies with the free parameters in this model such as the equation of state during the contraction phase and the critical energy density during the bounce phase. We also investigate whether such a signature in the particle detector survives at late times.

Source: Journal of Cosmology and Astroparticle Physics

DOI: 10.1088/1475-7516/2024/08/034

Authors: Aindriú Conroy, Peter Taylor

Institutions: Charles University, Dublin City University

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,135

Funder: Grantová Agentura České Republiky