Systematics of Moduli Stabilization, Inflationary Dynamics and Power Spectrum

Abstract

We study the scalar sector of type IIB superstring theory compactified on Calabi-Yau orientifolds as a place to find a mechanism of inflation in the early universe. In the large volume limit, one can stabilize the moduli in stages using perturbative method. We relate the systematics of moduli stabilization with methods to reduce the number of possible inflatons, which in turn lead to a simpler inflation analysis. Calculating the order-of-magnitude of terms in the equation of motion, we show that the methods are in fact valid. We then give the examples where these methods are used in the literature. We also show that there are effects of non-inflaton scalar fields on the scalar power spectrum. For one of the two methods, these effects can be observed with the current precision in experiments, while for the other method, the effects might never be observable.

20 pages, JHEP style; v.2 and v.3: typos fixed, discussion and references added

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Cited by in corpus (8)

• Astrophysical and Cosmological Implications of Large Volume String Compactifications
• Volume Modulus Inflation and the Gravitino Mass Problem
• Sparticle Spectra and LHC Signatures for Large Volume String Compactifications
• Kahler Moduli Inflation Revisited
• Accidental Inflation in the Landscape
• Two-field Kähler moduli inflation on large volume moduli stabilization
• Inflation in uplifted Supergravities
• Topology from Cosmology