Volume Stabilization and Acceleration in Brane Gas Cosmology

TL;DR

This paper explores brane gas cosmology models, demonstrating that including momentum modes can stabilize extra dimensions and lead to accelerated expansion of the observable universe.

Contribution

It introduces the effects of momentum modes in brane gas models, showing their role in stabilizing extra dimensions and enabling accelerated expansion.

Findings

Extra dimensions are stabilized by momentum modes.

The observable universe can undergo accelerated expansion.

Compact volume growth depends on the matter equation of state.

Abstract

We investigate toy cosmological models in (1+m+p)-dimensions with gas of p-branes wrapping over p-compact dimensions. In addition to winding modes, we consider the effects of momentum modes corresponding to small vibrations of branes and find that the extra dimensions are dynamically stabilized while the others expand. Adding matter, the compact volume may grow slowly depending on the equation of state. We also obtain solutions with winding and momentum modes where the observed space undergoes accelerated expansion.