# Modelling the current accelerated expansion of the Universe with Holographic Dark Energy

## TL;DR

This paper investigates a holographic dark energy model in a flat universe, incorporating interactions in the dark sector, and compares its cosmological parameters with the standard Lambda-CDM model.

## Contribution

It introduces a holographic dark energy model with phenomenological dark sector interactions and derives algebraic expressions for key cosmological parameters.

## Key findings

- The model provides algebraic formulas for deceleration and coincidence parameters.
- Graphical comparison shows differences between the holographic model and Lambda-CDM.
- The model accommodates interactions in the dark sector within a flat universe framework.

## Abstract

In this work we explore a Holographic Dark Energy Model in a flat Friedmann-Lema\^itre-Robertson-Walker Universe, which contains baryons, radiation, cold dark matter and dark energy within the framework of General Relativity. Furthermore, we consider three types of phenomenological interactions in the dark sector. With the proposed model we obtained the algebraic expressions for the cosmological parameters of our interest: the deceleration and coincidence parameters. Likewise, we graphically compare the proposed model with the $\Lambda$CDM model.