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  Kerr-NUT-de Sitter as an inhomogeneous non-singular bouncing cosmology

Anabalon, A., Bramberger, S., & Lehners, J.-L. (2019). Kerr-NUT-de Sitter as an inhomogeneous non-singular bouncing cosmology. Journal of High Energy Physics, 2019(9): 096. doi:10.1007/JHEP09(2019)096.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-883D-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-EFAE-C
Genre: Journal Article

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 Creators:
Anabalon, Andres1, Author              
Bramberger, Sebastian2, Author              
Lehners, Jean-Luc3, Author              
Affiliations:
1Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              
2Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1753351              
3Theoretical 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 present exact non-singular bounce solutions of general relativity in the presence of a positive cosmological constant and an electromagnetic field, without any exotic matter. The solutions are distinguished by being spatially inhomogeneous in one direction, while they can also contain non-trivial electromagnetic field lines. The inhomogeneity may be substantial, for instance, there can be one bounce in one region of the universe and two bounces elsewhere. Since the bounces are followed by a phase of accelerated expansion, the metrics described here also permit the study of (geodesically complete) models of inflation with inhomogeneous initial conditions. Our solutions admit two Killing vectors and may be re-interpreted as the pathology-free interior regions of Kerr-de Sitter black holes with non-trivial NUT charge. Remarkably enough, within this cosmological context, the NUT parameter does not introduce any string singularity nor closed timelike curves but renders the geometry everywhere regular, eliminating the big bang singularity by means of a bounce.

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 Dates: 2019-04-152019
 Publication Status: Published in print
 Pages: 17 pages, 4 figures
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 Rev. Method: -
 Identifiers: arXiv: 1904.07285
URI: http://arxiv.org/abs/1904.07285
DOI: 10.1007/JHEP09(2019)096
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Title: Journal of High Energy Physics
Source Genre: Journal
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Pages: - Volume / Issue: 2019 (9) Sequence Number: 096 Start / End Page: - Identifier: -