A Comparison of Quintessence and Nonlinear Born-Infeld Scalar Field Using Gold Supernova data

TL;DR

This paper compares the Non-Linear Born-Infeld scalar field model and quintessence model using supernova data, analyzing their equations of state, evolution, and cosmological parameters to determine which better fits observations.

Contribution

It provides a comparative analysis of NLBI and quintessence models with different potentials using supernova data, highlighting the slight superiority of the NLBI model.

Findings

NLBI model slightly better fits supernova data

Both models analyzed for equation of state and universe evolution

Transition redshift and universe age estimated

Abstract

We study the Non-Linear Born-Infeld(NLBI) scalar field model and quintessence model with two different potentials($V(\phi)=-s\phi$ and ${1/2}m^2\phi^2$). We investigate the differences between those two models. We explore the equation of state parameter w and the evolution of scale factor $a(t)$ in both NLBI scalar field and quintessence model. The present age of universe and the transition redshift are also obtained. We use the Gold dataset of 157 SN-Ia to constrain the parameters of the two models. All the results show that NLBI model is slightly superior to quintessence model.