Coupled dark energy: a dynamical analysis with complex scalar field

TL;DR

This paper performs a dynamical analysis of coupled dark energy models involving a complex scalar field, exploring stability and cosmological eras for various dark energy candidates, extending previous research.

Contribution

It introduces a comprehensive dynamical analysis of coupled dark energy with a complex scalar field, including multiple dark energy candidates and stability of critical points.

Findings

Identification of critical points corresponding to cosmological eras

Stability analysis for quintessence, phantom, and tachyon models

Extension of previous analyses with more general potentials

Abstract

The dynamical analysis for coupled dark energy with dark matter is presented, where a complex scalar field is taken into account and it is considered in the presence of a barothropic fluid. We consider three dark energy candidates: quintessence, phantom and tachyon. The critical points are found and their stabilities analyzed, leading to the three cosmological eras (radiation, matter and dark energy), for a generic potential. The results presented here enlarge the previous analyses found in the literature.