Dilaton Stabilization and Inflation in the D-brane World

TL;DR

This paper explores how the dilaton field can be stabilized in a D-brane universe and demonstrates that inflation can occur prior to dilaton stabilization, using a potential derived from D-brane tension and extra-dimensional curvature.

Contribution

It introduces a new mechanism for dilaton stabilization in D-brane cosmology and shows inflation can happen before the dilaton reaches its stable state.

Findings

Dilaton can be stabilized by D-brane tension and negative curvature.

Inflation occurs prior to dilaton stabilization.

Proposes a viable cosmological scenario in D-brane models.

Abstract

We study the dilaton stabilization in the D-brane world in which a D-brane constitutes our universe. The dilaton can be stabilized due to the interplay between the D-brane tension and the negative scalar curvature of extra dimensions. Cosmic evolution of the dilaton is investigated with the obtained dilaton potential and it is found that inflation can be realized before the settlement of the dilaton.