Braneworld cosmology almost without branes

TL;DR

This paper reviews braneworld cosmologies with inflation driven by a brane-confined scalar field, focusing on their unique Friedmann equations, perturbation spectra, and observational implications.

Contribution

It provides a comprehensive review of nonstandard Friedmann equations and their observational consequences in braneworld inflation models.

Findings

Analysis of perturbation spectra in braneworld scenarios

Discussion of observational signatures of nonstandard Friedmann equations

Comparison with standard cosmological models

Abstract

We review some general aspects of braneworld cosmologies in which an inflationary period driven by a scalar field confined on the brane is described by a nonstandard effective Friedmann equation. The perturbation spectra, consistency equations and observational consequences of these models are considered.