# Dynamics of nonlinear interacting dark energy models

## TL;DR

This paper studies the complex dynamics of nonlinear interacting dark energy models, analyzing their stability and cosmological implications in a flat universe with scalar fields and dark matter.

## Contribution

It introduces and analyzes new nonlinear interaction models between dark energy and dark matter, providing stability analysis and cosmological behavior insights.

## Key findings

- Stable late-time accelerated solutions identified
- Existence of radiation-like and inflationary solutions
- Potential for wCDM-like cosmological behavior

## Abstract

We investigate the cosmological dynamics of interacting dark energy models in which the interaction function is a nonlinear in terms of the energy densities. Considering explicitly the interaction between a pressureless dark matter and a scalar field, minimally coupled to Einstein gravity, we explore the dynamics of the spatially flat FLRW universe for the exponential potential of the scalar field.. We perform the stability analysis for the three nonlinear interaction models of our consideration through the analysis of critical points and we investigate the cosmological parameters and we discuss the physical behaviour at the critical points. From the analysis of the critical points we find a number of possibilities that include the stable late time accelerated solution, $w$CDM-like solution, radiation-like solution and moreover the unstable inflationary solution as well.