Transitions between de Sitter minima

Puneet Batra, Matthew Kleban

    Research output: Contribution to journalArticle

    Abstract

    We investigate the cosmological signatures of instantons mediating tunneling between de Sitter minima. For generic potentials the Coleman-de Luccia instanton does not necessarily exist; when it does not, the instanton which contributes to the decay rate is the trivial constant solution, known as the Hawking-Moss instanton. With the aid of a toy model we interpret this solution and describe the resulting cosmology. In neither the Coleman-de Luccia nor Hawking-Moss case can the resulting cosmology be closed. An observation of significant positive curvature would therefore rule out the possibility that our universe arose from any transition from a neighboring minimum in the string-theory landscape.

    Original languageEnglish (US)
    Article number103510
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume76
    Issue number10
    DOIs
    StatePublished - Nov 5 2007

    Fingerprint

    Instantons
    instantons
    Bryophytes
    Cosmology
    cosmology
    Positive Curvature
    String Theory
    Decay Rate
    string theory
    decay rates
    Trivial
    Signature
    universe
    curvature
    signatures
    Closed
    Model

    ASJC Scopus subject areas

    • Physics and Astronomy(all)
    • Nuclear and High Energy Physics
    • Mathematical Physics

    Cite this

    Transitions between de Sitter minima. / Batra, Puneet; Kleban, Matthew.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 76, No. 10, 103510, 05.11.2007.

    Research output: Contribution to journalArticle

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