Holographic Dark Energy Models in $f(Q,T)$ Gravity and Cosmic Constraint

TL;DR

This paper introduces a novel holographic dark energy model within $f(Q,T)$ gravity, combining observational data to explore cosmic acceleration and addressing cosmological parameter tensions.

Contribution

It develops a new $f(Q,T)$ gravity model incorporating holographic dark energy and performs observational constraints, advancing understanding of dark energy in modified gravity.

Findings

Model fits observational data well

Provides an alternative explanation for cosmic acceleration

Addresses cosmological parameter tensions

Abstract

In this work, we propose a new model that combines holographic dark energy with modified gravity $f(Q,T)$ to explore a possible explanation for the accelerated expansion of the universe. Since there are several tensions of cosmological parameters, we need to investigate different theories. We incorporate the holographic principle into non-metric gravity with non-minimal matter coupling and introduce the Barrow holographic dark energy model to account for a tighter corrections, allowing for a more generalized discussion. Furthermore, we perform parameter estimation using the latest observational data, including Type Ia supernova, BAO and Hubble parameter direct measurements. Our results show that the model provides a theoretical framework to describe late-time cosmic evolution and the universe's accelerated expansion. Despite the additional complexity introduced, the model offers a alternative approach for investigating dark energy within modified gravity theories.