Contribution to a conference proceedings/Journal Article

FZJ-2026-03096

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png QCD equation of state with improved precision from lattice simulations

Parotto, P. (Corresponding author) ; Borsányi, S. ; Fodor, Z.FZJ* ; Guenther, J. N. ; Kara, R.FZJ* ; Pásztor, A. ; Ratti, C. ; Szabó, K. K.FZJ*

2024
EDP Sciences Les Ulis

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Please use a persistent id in citations: doi:10.1051/epjconf/202429614007  doi:10.34734/FZJ-2026-03096

Abstract: The equation of state of Quantum Chromodynamics has been in recent years the focus of intense effort from first principle methods, mostly lattice simulations, with particular interest to the finite baryon density regime. Because of the sign problem, various extrapolation methods have been used to reconstruct bulk properties of the theory up to as far as $μ_B=T ≃ 3:5$. However, said efforts rely on the equation of state at vanishing baryon density as an integration constant, which up to $μ_B=T ≃ 2 - 2:5$ proves to be the dominant source of uncertainty at the level of precision currently available. In this contribution we present the update of our equation of state at zero net baryon density from 2014, performing a continuum limit from lattices with $N_τ =$ 8; 10; 12; 16. We show how the improved precision is translated in a lower uncertainty on the extrapolated equation of state at finite chemical potential.

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Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)
2. Modellierung von Energiesystemen (ICE-1)

Research Program(s):

1. 5111 - Domain-Specific Simulation & Data Life Cycle Labs (SDLs) and Research Groups (POF4-511) (POF4-511)
2. 1121 - Digitalization and Systems Technology for Flexibility Solutions (POF4-112) (POF4-112)

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Database coverage:
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