Inflationary attractor property of phantoms

TL;DR

This paper investigates the inflationary attractor property of phantom fields in different cosmological models, confirming its validity in standard cosmology but not in Randall-Sundrum II cosmology.

Contribution

It demonstrates that the inflationary attractor property holds for canonical and Born-Infeld phantom fields in standard cosmology but fails in Randall-Sundrum II cosmology.

Findings

Attractor property holds in standard cosmology for both phantom types.

Attractor property does not hold in Randall-Sundrum II cosmology.

Provides insights into model viability in different cosmological frameworks.

Abstract

There are some motivations to consider inflation driven by a phantom field. Before entering into some specific models and perform data fitting, it is important first investigating some general features that any viable inflation model should hold. The inflationary attractor property is an important one of those features. In this paper we will show that the inflationary attractor property still holds for canonical and Born-Infeld phantom fields in the standard Friedmann-Robertson-Walker cosmology, however, it does not hold for canonical and Born-Infeld phantom fields in the Randall -Sundrum II cosmology.