Interacting Holographic dark energy in chameleon tachyon cosmology

TL;DR

This paper introduces an interacting holographic dark energy model within chameleon-tachyon cosmology, where the interaction arises naturally from scalar field coupling, enabling the universe's accelerated expansion consistent with observations.

Contribution

It presents a novel IHDE model with interaction derived from scalar field coupling, linking holographic dark energy and tachyon fields in a unified cosmological framework.

Findings

Model demonstrates accelerated universe expansion

Model aligns with observational data

Reconstructs tachyon scalar field and potential

Abstract

We propose in this paper an interacting holographic dark energy (IHDE) model in chameleon--tachyon cosmology by interaction between the components of the dark sectors. In the formalism, the interaction term emerges from the scalar field coupling matter lagrangian in the model rather than being inserted into the formalism as an external source for the interaction. The correspondence between the tachyon field and the holographic dark energy (HDE) densities allows to reconstruct the tachyon scalar field and its potential in a flat FRW universe. The model can show the accelerated expansion of the universe and satisfies the observational data.