Triple unification of inflation, dark energy, and dark matter in two-scalar-field cosmology

TL;DR

This paper proposes a two-scalar-field cosmological model that unifies inflation, dark matter, and dark energy, explaining the universe's evolution with a single theoretical framework.

Contribution

It introduces a novel two-scalar-field model that simultaneously accounts for inflation, dark matter, and dark energy within a consistent cosmological scenario.

Findings

Model reproduces key features of universe evolution.

Scalar fields behave as dark matter and dark energy at different epochs.

Viable parameter ranges for cosmological solutions.

Abstract

A unified description of inflation, dark energy, and dark matter is presented within a two-scalar-field cosmological model. Inflation, assumed to be of the warm type, is driven by one of the scalar fields, which, shortly after the end of the inflationary period, decouples from radiation and begins to oscillate rapidly around the minimum of its potential, thus behaving like cold dark matter; the second scalar field emerges, at recent times, as the dominant component of the universe, giving rise to a second era of accelerated expansion. For certain values of the parameters of the model, the cosmological solutions arising in this triple unification of inflation, dark energy, and dark matter are viable, reproducing the main features of the evolution of the universe.