Scalar field dark matter and dark energy: a hybrid model for the dark sector

TL;DR

This paper proposes a hybrid scalar field model unifying dark matter and dark energy, explaining their origins and effects on cosmic evolution and observable phenomena.

Contribution

It introduces a novel model with two interacting scalar fields using a hybrid inflation potential to unify dark matter and dark energy.

Findings

Model describes dark sector as a pressureless fluid coupled to a light scalar field

Predicts specific signatures in cosmic microwave background radiation

Suggests implications for large-scale structure formation

Abstract

Diverse cosmological and astrophysical observations strongly hint at the presence of dark matter and dark energy in the Universe. One of the main goals of Cosmology is to explain the nature of these two components. It may well be that both dark matter and dark energy have a common origin. In this paper, we develop a model in which the dark sector arises due to an interplay between two interacting scalar fields. Employing a hybrid inflation potential, we show that the model can be described as a system of a pressureless fluid coupled to a light scalar field. We discuss this setup's cosmological consequences and the observational signatures in the cosmic microwave background radiation and the large-scale structures.