Lattice QCD equation of state : improving the differential method

Abstract

We propose an improvement of the differential method for the computation of the equation of state of QCD from lattice simulations. In contrast to the earlier differential method our technique yields positive pressure for all temperatures including in the transition region. Employing it on temporal lattices of 8, 10 and 12 sites and by extrapolating to zero lattice spacing we obtained the pressure, energy density, entropy density, specific heat and speed of sound in quenched QCD for 0.9 < T/Tc < 3. A comparison of our results is made with those from the dimensional reduction approach and a conformal symmetric theory at high-temperature.

Version to be published in Pramana. Title modified. Explanatory material added. Figure 6b redrawn with corrected normalization for the AdS/CFT line

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• Correlations of Energy-Momentum Tensor via Gradient Flow in SU(3) Yang-Mills Theory at Finite Temperature
• QCD and String Theory
• Effect of the curvature on a statistical model of Quark-Gluon-Plasma fireball in the hadronic medium
• Heavy Ions at LHC: A Quest for Quark-Gluon Plasma
• Gauge-String Dualities and Some Applications