Pre-big bang on the brane

TL;DR

This paper explores brane world cosmology within string theory, showing that brane dynamics can resemble pre-big bang models with Kasner-like solutions, and compares it to other brane scenarios.

Contribution

It introduces Kasner-like solutions in a gravi-dilaton brane scenario, linking brane dynamics to pre-big bang cosmology in the string frame.

Findings

Kasner-like solutions exist on the brane in this scenario.

Brane dynamics resemble the low curvature phase of pre-big bang cosmology.

Differences and similarities with Randall-Sundrum and standard pre-big bang models are discussed.

Abstract

The equations of motion and junction conditions for a gravi-dilaton brane world scenario are studied in the string frame. It is shown that they allow Kasner-like solutions on the brane, which makes the dynamics of the brane very similar to the low curvature phase of pre-big bang cosmology. Analogies and differences of this scenario with the Randall-Sundrum one and with the standard bulk pre-big bang dynamics are also discussed.