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Bounding the QCD Equation of State with the Lattice

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arxiv 2309.15149 v2 pith:GZEUT4NS submitted 2023-09-26 nucl-th hep-lat

classification nucl-thhep-lat
keywords boundpressurealphachemicalcorrectionsequationlatticeneutron
verification ladder T0 review T1 audit T2 compute T3 formal
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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-phase-quenched and the true pressure P is of order alpha^3 P. The corrections arise from a single Feynman diagram; its calculation would render remaining corrections of order alpha^4 P.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Perturbative QCD reveals the softening of matter in the cores of massive neutron stars

    astro-ph.HE 2025-06 conditional novelty 7.0 of 10

    First-principles perturbative QCD constraints, propagated via thermodynamic consistency, reveal that the neutron-star equation of state must soften near the maximum stable mass, favoring quark matter cores or a phase ...

  2. Coherent State Path Integral Reveals Unexpected Vacuum Structure in Thermal Field Theory

    hep-th 2025-07 reject novelty 3.0 of 10

    A coherent-state derivation of the thermal partition function yields extra vacuum and mass-coupling terms that the authors claim are novel, though these terms reflect the chosen operator ordering.

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