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MINIMAL MODELS OF INFLATION IN SUPERGRAVITY AND SUPERSTRINGS // Tomsk State Pedagogical University Bulletin. 2014. Issue 12 (153). P. 127-130

A novel framework is proposed for embedding the natural inflation into the type IIA superstrings compactified on a Calabi￾Yau three-fold. Inflaton is identified with axion of the universal hypermultiplet (UH). The other UH scalars (including dilaton) are stabilized by the CY fluxes whose impact can be described by gauging of the abelian isometry associated with the axion. The stabilizing scalar potential is controlled by the integrable three-dimensional Toda equation. The inflationary scalar potential of the UH axion is dynamically generated at a lower scale in the natural inflation via the non-perturbative quantum field effects such as gaugino condensation. The natural inflation has two scales that allow any values of the CMB observables (ns, r).

Keywords: inflation, supergravity, superstrings