Bulk Features of the Quark Gluon Plasma at Finite Density

Szabolcs Borsanyi (), Zoltan Fodor, Jana Günther, Sandor D. Katz, Attila Pasztor, Paolo Parotto, Ruben Kara, Claudia Ratti and K. K. Szabó
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Szabolcs Borsanyi: Wuppertal University, Department of Physics
Zoltan Fodor: Wuppertal University, Department of Physics
Jana Günther: Wuppertal University, Department of Physics
Sandor D. Katz: Eötvös University, Institute for Theoretical Physics
Attila Pasztor: Eötvös University, Institute for Theoretical Physics
Paolo Parotto: Pennsylvania State University, Department of Physics
Ruben Kara: Wuppertal University, Department of Physics
Claudia Ratti: University of Houston, Department of Physics
K. K. Szabó: Wuppertal University, Department of Physics

A chapter in High Performance Computing in Science and Engineering '22, 2024, pp 77-86 from Springer

Abstract: Abstract Pressure, energy density, entropy density and baryon number are the basic bulk features of quark gluon plasma (QGP), the deconfined phase of Quantum Chromodynamics (QCD). Knowledge of these quantities is a prerequisite for the successful interpretation of data from heavy ion collision experiments, and for the assessment of various effective models of quark matter. In this project we calculate the QCD equation of state at finite density in a novel expansion scheme, avoiding the shortcomings of the standard Taylor series in the chemical potential, thus circumventing the sign problem of finite density QCD for chemical potentials relevant for the RHIC Beam Energy Scan. In the first year we extrapolated the thermodynamics to finite baryon density, which was a proof of principle result [1]. In the second year we calculated the extrapolation for the actual experimental setting by enforcing strangeness neutrality. The continuum extrapolated results of the second year appeared in Ref. [2]. We also addressed the algorithmic issue of super-critical slowing down by applying parallel tempering for the quark-less case, where the transition is first order [3].

Date: 2024
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DOI: 10.1007/978-3-031-46870-4_6

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