Generalized Chaplygin gas as geometrical dark energy

TL;DR

This paper investigates a geometrical interpretation of the generalized Chaplygin gas as a form of dark energy within brane world models, deriving cosmological equations consistent with observations.

Contribution

It introduces a geometrical framework for the generalized Chaplygin gas in brane world theories, linking dark energy to extra-dimensional geometry.

Findings

Modified Friedmann equations derived

Deceleration parameter matches observational data

Estimated universe age consistent with observations

Abstract

The generalized Chaplygin gas provides an interesting candidate for the present accelerated expansion of the universe. We explore a geometrical explanation for the generalized Chaplygin gas within the context of brane world theories where matter fields are confined to the brane by means of the action of a confining potential. We obtain the modified Friedmann equations, deceleration parameter and age of the universe in this scenario and show that they are consistent with the present observational data.