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  Cycles in the Multiverse

Johnson, M. C., & Lehners, J.-L. (2012). Cycles in the Multiverse. Physical Review D, 85(10): 103509. doi:10.1103/PhysRevD.85.103509.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-A363-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-A365-A
Genre: Journal Article

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1112.3360 (Preprint), 956KB
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 Creators:
Johnson, Matthew C., Author
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,General Relativity and Quantum Cosmology, gr-qc
 Abstract: Eternal inflation is a seemingly generic consequence of theories that give rise to accelerated expansion of the universe and possess multiple vacuum states. Making predictions in an eternally inflating universe is notoriously difficult because one must compare infinite quantities, and a wide variety of regulating procedures yield radically different results. This is the measure problem of eternal inflation. In this paper, we analyze models of eternal inflation which allow for the possibility of cyclic bubble universes: in each bubble, standard cosmological evolution is re-played over and over again. Eternal inflation can generically arise in cyclic models that include a dark energy dominated phase. In such models, several problematic consequences of standard regulating procedures, such as the youngness and Boltzmann Brain problems, are substantially alleviated. We discuss the implications for making predictions in cyclic models, as well as some general implications for understanding the measure problem in eternal inflation.

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 Dates: 2011-12-142012
 Publication Status: Published in print
 Pages: 22 pages and 8 figures
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1112.3360
DOI: 10.1103/PhysRevD.85.103509
 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: 85 (10) Sequence Number: 103509 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258