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  Eternal Inflation With Non-Inflationary Pocket Universes

Lehners, J.-L. (2012). Eternal Inflation With Non-Inflationary Pocket Universes. Physical Review D, 86(4): 043518. doi:10.1103/PhysRevD.86.043518.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-A367-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-A369-2
Genre: Journal Article

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1206.1081 (Preprint), 156KB
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 Creators:
Lehners, Jean-Luc1, Author              
Affiliations:
1Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE, ou_24014              

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Free keywords: High Energy Physics - Theory, hep-th,Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO
 Abstract: Eternal inflation produces pocket universes with all physically allowed vacua and histories. Some of these pocket universes might contain a phase of slow-roll inflation, some might undergo cycles of cosmological evolution and some might look like the galilean genesis or other "emergent" universe scenarios. Which one of these types of universe we are most likely to inhabit depends on the measure we choose in order to regulate the infinities inherent in eternal inflation. We show that the currently leading measure proposals, namely the global light-cone cut-off and its local counterpart, the causal diamond measure, as well as closely related proposals, all predict that we should live in a pocket universe that starts out with a {\it small} Hubble rate, thus favoring emergent and cyclic models. Pocket universes which undergo cycles are further preferred, because they produce habitable conditions repeatedly inside each pocket.

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 Dates: 2012-06-052012
 Publication Status: Published in print
 Pages: 12 pages, 2 figures
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1206.1081
DOI: 10.1103/PhysRevD.86.043518
 Degree: -

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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : Published for the American Physical Society by the American Institute of Physics
Pages: - Volume / Issue: 86 (4) Sequence Number: 043518 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258