Non-linear interactions in cosmologies with energy exchange
Publication Date
2020-02-13Journal Title
European Physical Journal C
ISSN
1434-6044
Publisher
Springer Science and Business Media LLC
Volume
80
Issue
2
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Barrow, J., & Kittou, G. (2020). Non-linear interactions in cosmologies with energy exchange. European Physical Journal C, 80 (2) https://doi.org/10.1140/epjc/s10052-020-7642-2
Description
Funder: Science and Technology Facilities Council; doi: http://dx.doi.org/10.13039/501100000271
Abstract
<jats:title>Abstract</jats:title><jats:p>We investigate the case of two interacting fluids in homogeneous and isotropic cosmologies with a non-linear interaction term. The interaction term avoids the unrealistic form generally used in the literature, beginning with Tolman, in which the interaction is zero when the Hubble parameter vanishes. A variety of exact solutions for the scale factor are found and describe a range of new behaviors. We also extend the analysis of possible cosmological solutions with interacting fluids when curvature is taken into consideration. We use an example of energy exchange between radiation and scalar field to alleviate the flatness problem.</jats:p>
Keywords
Regular Article - Theoretical Physics
Sponsorship
Science and Technology Facilities Council (ST/P000673/1)
Identifiers
arxiv: arxiv:1907.06410v1, s10052-020-7642-2, 7642
External DOI: https://doi.org/10.1140/epjc/s10052-020-7642-2
This record's URL: https://www.repository.cam.ac.uk/handle/1810/317558
Rights
Attribution 4.0 International (CC BY 4.0)
Licence URL: https://creativecommons.org/licenses/by/4.0/
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