Inflation from IIB Superstrings with Fluxes

TL;DR

This paper explores inflation driven by flux-induced potentials in IIB superstring theory, analyzing how modified dynamics can produce inflation and possibly accelerated contraction, with implications for cosmology.

Contribution

It introduces a novel inflationary model from IIB superstring fluxes with two moduli, incorporating Randall-Sundrum II modifications to the Friedmann equation.

Findings

The model can produce inflation under certain conditions.

Modified dynamics allow for accelerated contraction phases.

The viability of the model in cosmology is discussed.

Abstract

We study the conditions needed to have an early epoch of inflationary expansion with a potential coming from IIB superstring theory with fluxes involving two moduli fields. The phenomenology of this potential is different from the usual hybrid inflation scenario and we analize the possibility that the system of field equations undergo a period of inflation in three different regimes with the dynamics modified by a Randall-Sundrum II term in the Friedmann equation. We find that the system can produce inflation and due to the modification of the dynamics, a period of accelerated contraction can follow or preceed this inflationary stage depending on the sign of one of the parameters of the potential. We discuss on the viability of this model in a cosmological context.