Inflation-Dark Matter unified through Quantum Generation
A. de la Macorra, F. Briscese

TL;DR
This paper proposes a novel unification of inflation and dark matter through a single scalar field, utilizing quantum generation to avoid fine tuning and achieve natural transition between cosmological phases.
Contribution
It introduces a quantum generation mechanism for the scalar field that unifies inflation and dark matter without additional parameters or fine tuning.
Findings
Quantum generation enables natural transition from inflation to dark matter.
Unification achieved with only three parameters, same as separate models.
No fine tuning required for the energy density of the scalar field.
Abstract
We unify inflation and dark matter via a single scalar field phi. One of the main difficulties for this unification is that between inflation and dark matter one needs a successful reheating process and a long lasting period of radiation. Therefore the amount of energy density in the inflaton-dark matter field phi must be fine tune after reheating to give dark matter. Here we show an alternative scheme in which the inflaton decays completely, disappearing entirely from the spectrum. However, at low energies, before matter-radiation equality, the same interaction term that leads to the inflaton decay, regenerates phi. An essential feature is that the transition between the intermediate radiation dominated to the dark matter phase is related to a quantum generation of the scalar field \phi instead to purely classical dynamics. Thanks to this quantum transition the inflation-dark matter…
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Taxonomy
TopicsDark Matter and Cosmic Phenomena · Atomic and Subatomic Physics Research
