QCD Cosmology from the Lattice Equation of State

McGuigan, Michael; Soldner, Wolfgang

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QCD Cosmology from the Lattice Equation of State

Michael McGuigan, Wolfgang Soldner (Brookhaven)

Oct 2008 - 21 pages

e-Print: arXiv:0810.0265 [hep-th] | PDF

Abstract (arXiv)
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.

$Time versus temperature (left) and time dependence of the scale factor (right) from Lattice QCD data. The behavior of $a(t)$ for radiation (black line) and matter (black dashes) is shown. Weset $t_{min} = t(T=719MeV)\equiv ( \frac{32\pi G}{3} \varepsilon(T=719MeV))^{-1/2} $ in $ms$ for $a(t_{min})=1.$$ Show more plots

Record added 2008-10-01, last modified 2016-03-26

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