Standard Cosmology in the DGP Brane Model

TL;DR

This paper explores how standard Friedmann cosmology, including our current dust and Lambda-dominated universe, can be embedded within the DGP brane model, offering insights into higher-dimensional gravitational theories.

Contribution

It demonstrates the embedding of standard cosmology into the DGP brane model, providing a new approach to understanding cosmological dynamics in higher-dimensional frameworks.

Findings

Successful embedding of Friedmann cosmology in the DGP model

Realization of current dust+Lambda universe within the model

Insights into higher-dimensional gravitational theories

Abstract

Large extra dimensions provide interesting extensions of our parameter space for gravitational theories. There exist now brane models which can perfectly reproduce standard four-dimensional Friedmann cosmology. These models are not motivated by observations, but they can be helpful in developing new approaches to the dimensionality problem in string theory. I describe the embedding of standard Friedmann cosmology in the DGP model, and in particular the realization of our current (dust+Lambda)-dominated universe in this model.