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Bounding the QCD Equation of State with the Lattice
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Journal Article
Bounding the QCD Equation of State with the Lattice
2023
Overview
A
bstract
The equation of state of QCD matter at high densities is relevant for neutron star structure and for neutron star mergers and has been a focus of recent work. We show how lattice QCD simulations, free of sign problems, can provide an
upper bound
on the pressure as a function of quark chemical potentials. We show that at large chemical potentials this bound should become quite sharp; the difference between the upper bound on the pressure P
PQ
and the true pressure
P
is of order P
PQ
− P
=
O
(
α
s
3
P
). The corrections arise from a single Feynman diagram; its calculation would render remaining corrections
O
(
α
s
4
P
).
Publisher
Springer Berlin Heidelberg,Springer Nature B.V,SpringerOpen
