Supergravity Brane Cosmologies

TL;DR

This paper explores solitonic brane cosmologies with curved world-volumes influenced by evolving dilaton fields, connecting to string and M-theory branes, and discusses implications for inflation and higher-dimensional interpretations.

Contribution

It introduces new solitonic brane cosmologies with curved world-volumes and links them to string and M-theory branes, including novel interpretations of D8-brane cosmology.

Findings

Curved brane-world solutions with evolving dilaton fields.

Connections between brane cosmologies and string/M-theory branes.

Discussion of dilaton-driven inflation scenarios.

Abstract

Solitonic brane cosmologies are found where the world-volume is curved due to the evolution of the dilaton field on the brane. In many cases, these may be related to the solitonic Dp- and M5-branes of string and M-theory. An eleven-dimensional interpretation of the D8-brane cosmology of the massive type IIA theory is discussed in terms of compactification on a torus bundle. Braneworlds are also found in Horava-Witten theory compactified on a Calabi-Yau three-fold. The possibility of dilaton-driven inflation on the brane is discussed.