Non-linear interactions in cosmologies with energy exchange


Change log
Authors
Barrow, JD 
Abstract

jats:titleAbstract</jats:title>jats:pWe 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>

Description

Funder: Science and Technology Facilities Council; doi: http://dx.doi.org/10.13039/501100000271

Keywords
5107 Particle and High Energy Physics, 51 Physical Sciences, 7 Affordable and Clean Energy
Journal Title
European Physical Journal C
Conference Name
Journal ISSN
1434-6044
1434-6052
Volume Title
80
Publisher
Springer Science and Business Media LLC
Sponsorship
Science and Technology Facilities Council (ST/P000673/1)