Moduli Stabilization and Inflationary Cosmology with Poly-Instantons in Type IIB Orientifolds

TL;DR

This paper explores how poly-instanton corrections in Type IIB orientifolds influence moduli stabilization and enable inflationary models, with stabilized moduli acting as inflatons and aligning with cosmological data.

Contribution

It provides concrete examples of poly-instanton effects in Type IIB orientifolds and demonstrates their role in stabilizing moduli and facilitating inflation within the LARGE volume scenario.

Findings

The Kaehler modulus is stabilized by poly-instanton effects.

Displacing the stabilized modulus can produce inflationary dynamics.

Results are consistent with current cosmological observations.

Abstract

Equipped with concrete examples of Type IIB orientifolds featuring poly-instanton corrections to the superpotential, the effects on moduli stabilization and inflationary cosmology are analyzed. Working in the framework of the LARGE volume scenario, the Kaehler modulus related to the size of the four-cycle supporting the poly-instanton contributes sub-dominantly to the scalar potential. It is shown that this Kaehler modulus gets stabilized and, by displacing it from its minimum, can play the role of an inflaton. Subsequent cosmological implications are discussed and compared to experimental data.