Volume modulus inflation and the gravitino mass problem

J. P. Conlon, R. Kallosh, A. Linde, F. Quevedo

Research output: Contribution to journalArticlepeer-review


The Hubble constant during the last stages of inflation in a broad class of models based on the Kachru-Kallosh-Linde-Trivedi mechanism should be smaller than the gravitino mass, . We point out that in the models with large volume of compactification the corresponding constraint typically is even stronger, , in Planck units. In order to address this problem, we propose a class of models with large volume of compactification where inflation may occur exponentially far away from the present vacuum state. In these models, the Hubble constant during inflation can be many orders of magnitude greater than the gravitino mass. We introduce a toy model describing this scenario, and discuss its strengths and weaknesses.

Original languageEnglish (US)
Article number011
JournalJournal of Cosmology and Astroparticle Physics
Issue number9
StatePublished - Sep 1 2008


  • Cosmology of theories beyond the SM
  • Cosmology with extra dimensions
  • Inflation
  • String theory and cosmology

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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