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  Non-Singular Bounces Catalysed by Dark Energy

Bramberger, S., & Lehners, J.-L. (in preparation). Non-Singular Bounces Catalysed by Dark Energy.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-0232-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-0235-F
Genre: Paper

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1901.10198.pdf (Preprint), 4MB
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 Creators:
Bramberger, Sebastian1, Author              
Lehners, Jean-Luc2, Author              
Affiliations:
1Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1753351              
2String Cosmology, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1753351              

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Free keywords: High Energy Physics - Theory, hep-th,General Relativity and Quantum Cosmology, gr-qc
 Abstract: We investigate classically non-singular bounces caused by dark energy. In the presence of positive spatial curvature, vacuum energy, either in the form of a cosmological constant or a scalar field potential, allows for an open set of initial conditions leading to non-singular bounces, without any violation of the null energy condition. We study anisotropic Bianchi IX cosmologies, and demonstrate that they can even have multiple bounces, accompanied by intricate evolutions of the anisotropies that provide a non-singular analogue of mixmaster crunches. The relation of these solutions to more complete cosmological models, as well as to the recently proposed swampland criteria, are briefly discussed.

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 Dates: 2019-01-292019-02-11
 Publication Status: Not specified
 Pages: 30 pages, 25 figure files; v2: references added
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1901.10198
URI: http://arxiv.org/abs/1901.10198
 Degree: -

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