Inflation from periodic extra dimensions

Tetsutaro Higaki, Yoshiyuki Tatsuta

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We discuss a realization of a small field inflation based on string inspired supergravities. In theories accompanying extra dimensions, compactification of them with small radii is required for realistic situations. Since the extra dimension can have a periodicity, there will appear (quasi-)periodic functions under transformations of moduli of the extra dimensions in low energy scales. Such a periodic property can lead to a UV completion of so-called multi-natural inflation model where inflaton potential consists of a sum of multiple sinusoidal functions with a decay constant smaller than the Planck scale. As an illustration, we construct a SUSY breaking model, and then show that such an inflaton potential can be generated by a sum of world sheet instantons in intersecting brane models on extra dimensions containing orbifold. We show also predictions of cosmic observables by numerical analyzes.

Original languageEnglish
Article number011
JournalJournal of Cosmology and Astroparticle Physics
Volume2017
Issue number7
DOIs
Publication statusPublished - 2017

Keywords

  • axions
  • extra dimensions
  • inflation

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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