The Continuous Tower of Scalar Fields as a System of Interacting Dark Matter -- Dark Energy

TL;DR

This paper introduces a novel parameterization for the coupling in interacting dark matter and dark energy models by linking them with the Continuous Tower of Scalar Fields, simplifying the evolution of scalar fields and matching results with traditional models.

Contribution

It proposes a new approach connecting the Continuous Tower of Scalar Fields with interacting dark matter and dark energy, simplifying the scalar field evolution and providing a new perspective on energy transfer.

Findings

The simplified scalar field evolution matches traditional interacting dark sector models.

The new parameterization effectively describes energy transfer via scalar fields.

Validation shows consistency with established dark matter-dark energy interactions.

Abstract

This paper aims to introduce a new parameterisation for the coupling Q in interacting dark matter and dark energy models by connecting said models with the Continuous Tower of Scalar Fields model. Based upon the existence of a dark matter and a dark energy sectors in the Continuous Tower of Scalar Fields, a simplification is considered for the evolution of a single scalar field from the tower, validated in this paper. This allows for the results obtained with the Continuous Tower of Scalar Fields model to match those of an interacting dark matter - dark energy system, considering that the energy transferred from one fluid to the other is given by the energy of the scalar fields that start oscillating at a given time, rather than considering that the energy transference depends on properties of the whole fluids that are interacting.