D-braneworld cosmology II: Higher order corrections

TL;DR

This paper explores higher order string corrections in D-brane cosmology, revealing modifications to the brane's equation of state and emphasizing the importance of S-branes for a complete universe history.

Contribution

It extends previous D-brane cosmology models by including higher order corrections, showing their impact on the brane's dynamics and equation of state.

Findings

Higher order corrections alter previous results.

Gauge field behaves as radiation at low energy.

Model limited by a critical energy density.

Abstract

We investigate braneworld cosmology based on the D-brane initiated in our previous paper. The brane is described by a Born-Infeld action and the gauge field is contained. The higher order corrections of an inverse string tension will be addressed. The results obtained by the truncated argument are altered by the higher order corrections. The equation of state of the gauge field on the brane is radiation-like in low energy scales and almost dust-like fluid in high energy scales. Our model is, however, limited below a critical finite value of the energy density. For the description of full history of our universe the presence of a S-brane might be essential.