After the Dark Ages

TL;DR

This paper proposes a unified cosmological model involving scalar and pseudo-scalar fields to explain Dark Energy and Dark Matter, offering insights into the Universe's evolution and matter-antimatter asymmetry.

Contribution

It introduces a simple unified model of the Dark Sector using scalar and pseudo-scalar fields, linking Dark Energy and Dark Matter within a single framework.

Findings

Predicts late-time Universe evolution consistent with observations

Suggests implications for matter-antimatter asymmetry

Provides a theoretical basis for Dark Energy and Dark Matter connection

Abstract

After recalling some puzzles in cosmology and briefly reviewing the Friedmann-Lema\^itre cosmos a simple unified model of the ``Dark Sector'' is described. This model involves a scalar field and a pseudo-scalar axion field that give rise to Dark Energy in the form of ``quintessence'' and to ``fuzzy'' Dark Matter, respectively. Predictions of the model concerning the late-time evolution of the Universe and possible implications for the problem of the observed Matter-Antimatter Asymmetry in the Universe are sketched.