QCD Cosmology from the Lattice Equation of State

TL;DR

This paper uses lattice QCD data to model the universe's expansion, comparing it with other low-temperature QCD models to understand cosmological implications of QCD thermodynamics.

Contribution

It introduces a lattice QCD-based approach to determine the universe's scale factor evolution, providing a more fundamental understanding of QCD-driven cosmology.

Findings

Lattice QCD yields a specific scale factor evolution consistent with other models at late times.

Comparison shows differences between lattice QCD and hadronic models in cosmological predictions.

Results support the viability of lattice QCD as a tool for cosmological modeling.

Abstract

We numerically determine the time dependence of the scale factor from the lattice QCD equation of state, which can be used to define a QCD driven cosmology. We compare a lattice approach to QCD cosmology at late times with other models of the low temperature equation of state including the hadronic resonance gas model, Hagedorn model and AdS/CFT.