Two-scalar-field model for the interaction of dark energy and dark matter

TL;DR

This paper introduces a two-scalar-field model to explore the interaction between dark energy and dark matter, demonstrating its effects on cosmic expansion and transient acceleration phenomena.

Contribution

It presents a novel two-scalar-field framework with a polynomial-modified exponential potential, analyzing its impact on cosmic dynamics and acceleration.

Findings

Reproduces cosmic expansion for various dark matter masses

Identifies solutions with transient accelerated expansion

Explores potential modifications leading to realistic acceleration scenarios

Abstract

In this paper, we study the effects of an interaction between dark matter and dark energy through a two scalar field model with a potential $V(\phi,\chi)=e^{-\lambda\phi}P(\phi,\chi)$, where $P(\phi,\chi)$ is a polynomial. We show that the cosmic expansion dynamics of the Universe is reproduced for a large range of the bare mass of the dark matter field and that there exist solutions with transient accelerated expansion. A modification in the exponential behavior of the potential is studied, with important physical implications, including the possibility of more realistic transient acceleration solutions.