Non-linear interactions in cosmologies with energy exchange
Published version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
Barrow, John D.
Kittou, Georgia https://orcid.org/0000-0002-1492-0217
Abstract
Abstract: 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.
Description
Funder: Science and Technology Facilities Council; doi: http://dx.doi.org/10.13039/501100000271
Keywords
Regular Article - Theoretical Physics
Journal Title
The European Physical Journal C
Conference Name
Journal ISSN
1434-6044
1434-6052
1434-6052
Volume Title
80
Publisher
Springer Berlin Heidelberg