Dark Sector from Interacting Canonical and Non-Canonical Scalar Fields

TL;DR

This paper explores models of dark energy and dark matter interactions using canonical and non-canonical scalar fields, constrained by symmetry principles and astronomical data, to match late Universe observations.

Contribution

It introduces a unified framework for interacting scalar field models of dark sectors using Noether symmetry to select potentials and couplings.

Findings

Models are consistent with astronomical data.

Cosmological solutions align with observed late Universe evolution.

Interaction effects influence dark energy and dark matter dynamics.

Abstract

In this work it is investigated general models with interactions between two canonical scalar fields and between one non-canonical (tachyon-type) and one canonical scalar field. The potentials and couplings to the gravity are selected through the Noether symmetry approach. These general models are employed to describe interactions between dark energy and dark matter, with the fields being constrained by the astronomical data. The cosmological solutions of some cases are compared with the observed evolution of the late Universe.