Extended phase-space analysis of the Horava-Lifshitz cosmology

TL;DR

This paper analyzes the phase space of Horava-Lifshitz cosmology with various scalar field potentials, extending previous work through compactification and stability analysis, revealing new insights into the stability of de Sitter solutions.

Contribution

It introduces a comprehensive phase space analysis of Horava-Lifshitz cosmology using the $f$-devisers method, including compactification and stability of de Sitter solutions, extending prior studies.

Findings

Extended phase space description for exponential and other potentials.

Identified stability conditions for de Sitter solutions.

Compared advantages of Center Manifold theory over previous methods.

Abstract

We examine the phase space of Ho\v{r}ava-Lifshitz cosmology for a wide range of self-interacting potentials for the scalar field under the detailed-balance condition and without imposing it, by means of the powerful method of $f$-devisers. A compactification approach is performed for the exponential potential and for potentials beyond the exponential one, extending the previous findings in the literature. By using this approach it is possible to describe the finite region of the phase space and the region where the phase-space variables becomes infinity. Furthermore, we present several results concerning the stability of the \emph{de Sitter} solution in Ho\v{r}ava-Lifshitz cosmology using Center Manifold theory. The advantages of this procedure are unveiled immediately when it is compared with the Normal Forms Calculations presented before in the literature.