Stabilizing radion and dilaton with brane gas and flux

TL;DR

This paper investigates how brane gas and flux contributions create effective potentials that stabilize the radion and dilaton moduli fields in cosmology, while allowing for inflation of the three-dimensional volume.

Contribution

It demonstrates that brane gas and flux generate potentials with global minima, enabling dynamic stabilization of radion and dilaton fields in a cosmological setting.

Findings

Radion and dilaton can be stabilized by effective potentials from brane gas and flux.

The potentials exhibit global minima suitable for stabilization.

The three-dimensional volume potential is runaway-type, allowing for inflation.

Abstract

We consider the dynamics of moduli fields in brane gas cosmology. By calculating the effective potentials from brane gas and bulk RR field, we found an attractor behavior that can fix both the radion and the dilaton. The potentials for radion and dilaton show global minima that can provide the stabilizing forces so that they can be stabilized dynamically. The effective potential for the three-dimensional volume is runaway-type so that it can inflate.