Stability analysis of two-fluid dark energy models

TL;DR

This paper investigates the stability of anisotropic cosmological models with dark energy, matter, magnetic fields, and cosmic strings, revealing how these components influence stability in different spatial directions.

Contribution

It provides a detailed stability analysis of four anisotropic dark energy models, highlighting the effects of matter, magnetic fields, and cosmic strings on stability behavior.

Findings

Models are stable in certain spatial directions.

Cosmic strings alter stability behavior significantly.

Magnetic fields disturb stability in early epochs.

Abstract

In this paper, we have studied the stability of the cosmological models with dark energy and combination of matter fields and dark energy in an anisotropic space time. The pressure anisotropy along the spatial directions are derived and its stability in each direction has been examined. The four models presented here, show its stability on certain spatial direction. The role of matter field on the stability analysis has been obtained. The positive and negative value of cosmic string completely changed the stability behaviour of the model. The presence of a magnetic field disturbs the stability aspects of the models at least in an early epoch.