Non-linear interactions in cosmologies with energy exchange
Barrow, John D.
The European Physical Journal C
Springer Berlin Heidelberg
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Barrow, J. D., & Kittou, G. (2020). Non-linear interactions in cosmologies with energy exchange. The European Physical Journal C, 80 (2)https://doi.org/10.1140/epjc/s10052-020-7642-2
Funder: Science and Technology Facilities Council; doi: http://dx.doi.org/10.13039/501100000271
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.
Regular Article - Theoretical Physics
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
Attribution 4.0 International (CC BY 4.0)
Licence URL: https://creativecommons.org/licenses/by/4.0/