Quantum gravity and the holographic dark energy cosmology

TL;DR

This paper explores how quantum gravity effects with a minimum length can generate a holographic dark energy model, linking the cosmological constant to initial conditions and inflationary parameters.

Contribution

It introduces a novel derivation of holographic dark energy from quantum gravity effects, connecting it to inflationary initial conditions.

Findings

The cosmological constant scale depends on inflationary parameters.

A physical principle during inflation can fix the initial conditions.

The model differs from traditional bounds based on black hole formation.

Abstract

The holographic dark energy model is obtained from a cosmological constant generated by generic quantum gravity effects giving a minimum length. By contrast, the usual bound for the energy density to be limited by the formation of a black hole simply gives the Friedmann equation. The scale of the current cosmological constant relative to the inflationary scale is an arbitrary parameter characterizing initial conditions, which however can be fixed by introducing a physical principle during inflation, as a function of the number of e-folds and the inflationary scale.