Coupled scalar field cosmology with effects of curvature

TL;DR

This paper explores how curvature influences coupled scalar field models of dark energy and dark matter, analyzing stability and late-time behavior in FLRW cosmology.

Contribution

It introduces a dynamic system approach to coupled scalar fields with curvature effects and identifies conditions for stable late-time cosmological solutions.

Findings

Stable late-time attractor solutions identified.

Curvature significantly affects system stability.

Model compatibility with cosmological observations demonstrated.

Abstract

In the present study, we investigate the interaction between dark energy and dark matter, particularly emphasizing the effects of curvature in the realm of Friedmann-Lemaitre-Robertson-Walker (FLRW) space-time. We examine the system by forming a dynamic set of equations for various critical points. Later, we study their stability characteristics and show that with a suitable choice of potential, the system gives rise to the late-time attractor (stable) solution in the expanding environment. Lastly, we present the cosmological compatibility of the model using the phase-space portrait tools.