Cosmological brane systems in warped spacetime

TL;DR

This paper explores time-dependent intersecting brane solutions in higher-dimensional supergravity, revealing their near-horizon warped AdS structure and deriving four-dimensional cosmological models with power-law expansion.

Contribution

It introduces dynamical intersecting brane solutions and connects them to warped AdS spacetimes and realistic cosmological models.

Findings

Near-horizon limits yield warped AdS spacetimes.

Solutions produce four-dimensional universes with power-law expansion.

Time dependence becomes negligible in near-horizon regimes.

Abstract

In this paper, we discuss the time-dependent brane solutions in higher-dimensional supergravity theories. We particularly focus on the dynamical extensions of the intersecting brane solutions involving three branes. We also show that in the near-horizon limits, where the time dependence is negligible, these branes describe warped anti-de Sitter spacetimes as in the corresponding static solutions. We finally examine the lower-dimensional cosmological dynamics obtained after compactifications of the higher-dimensional solutions and show the solutions we have found give the four-dimensional universe with power-law expansion.