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  Quantum Transitions Through Cosmological Singularities

Bramberger, S. F., Hertog, T., Lehners, J.-L., & Vreys, Y. (2017). Quantum Transitions Through Cosmological Singularities. Journal of Cosmology and Astroparticle Physics, 2017(07): 007. doi:10.1088/1475-7516/2017/07/007.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-A9B6-E Version Permalink: http://hdl.handle.net/21.11116/0000-0002-E8D3-A
Genre: Journal Article

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1701.05399.pdf (Preprint), 3MB
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 Creators:
Bramberger, Sebastian F., Author
Hertog, Thomas, Author
Lehners, Jean-Luc1, Author              
Vreys, Yannick, Author
Affiliations:
1String 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: In a quantum theory of cosmology spacetime behaves classically only in limited patches of the configuration space on which the wave function of the universe is defined. Quantum transitions can connect classical evolution in different patches. Working in the saddle point approximation and in minisuperspace we compute quantum transitions connecting inflationary histories across a de Sitter like throat or a singularity. This supplies probabilities for how an inflating universe, when evolved backwards, transitions and branches into an ensemble of histories on the opposite side of a quantum bounce. Generalising our analysis to scalar potentials with negative regions we identify saddle points describing a quantum transition between a classically contracting, crunching ekpyrotic phase and an inflationary universe.

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 Dates: 2017-01-192017
 Publication Status: Published in print
 Pages: 32 pages, 27 figures
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1701.05399
URI: http://arxiv.org/abs/1701.05399
DOI: 10.1088/1475-7516/2017/07/007
 Degree: -

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Title: Journal of Cosmology and Astroparticle Physics
Source Genre: Journal
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Pages: - Volume / Issue: 2017 (07) Sequence Number: 007 Start / End Page: - Identifier: -