Current observations with a decaying cosmological constant allow for chaotic cyclic cosmology

Ellis, George F.R. and Platts, Emma and Sloan, David and Weltman, Amanda (2016) Current observations with a decaying cosmological constant allow for chaotic cyclic cosmology. Journal of Cosmology and Astroparticle Physics, 2016 (04). p. 26. ISSN 1475-7516

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Abstract

We use the phase plane analysis technique of Madsen and Ellis [1] to consider a universe with a true cosmological constant as well as a cosmological “constant” that is decaying. Time symmetric dynamics for the inflationary era allows eternally bouncing models to occur. Allowing for scalar field dynamic evolution, we find that if dark energy decays in the future, chaotic cyclic universes exist provided the spatial curvature is positive. This is particularly interesting in light of current observations which do not yet rule out either closed universes or possible evolution of the cosmological constant. We present only a proof of principle, with no definite claim on the physical mechanism required for the present dark energy to decay.

Item Type: Journal Article
Journal or Publication Title: Journal of Cosmology and Astroparticle Physics
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3103
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 131197
Deposited By: ep_importer_pure
Deposited On: 11 Feb 2019 11:25
Refereed?: Yes
Published?: Published
Last Modified: 14 Aug 2019 04:49
URI: https://eprints.lancs.ac.uk/id/eprint/131197

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