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

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Physics and Astronomy (miscellaneous)

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