Renormalization group running cosmologies - from a scale setting to holographic dark energy

TL;DR

This paper explores how quantum field theory in curved spacetime leads to scale-dependent cosmological constants and Newton's constant, integrating these into holographic dark energy models to explain dark energy without new fields.

Contribution

It introduces a scale-setting procedure for renormalization group running cosmologies and incorporates scale-dependent constants into holographic dark energy models.

Findings

Natural emergence of scale-dependent $\\Lambda$ and G from quantum field theory.

Application of the framework to holographic dark energy models.

Potential explanation of dark energy without quintessence fields.

Abstract

A scale-dependent cosmological constant $\Lambda$ and the Newton constant G emerge naturally in quantum field theory in a curved space-time background leading to renormalization group running cosmologies. A scale-setting procedure is discussed in these cosmological models and the interpretation of the scale is emphasized. This setup introduces dark energy without invoking quintessence-like fields and can be applied to a variety of problems. The scale-dependent $\Lambda$ and G are also naturally incorporated into the generalized holographic dark energy model, and applied to different aspects of cosmology.