Fixed Scale Approach to Equation of State in Lattice QCD

Abstract

A new approach to study the equation of state in finite-temperature QCD is proposed on the lattice. Unlike the conventional method in which the temporal lattice size $N_t$ is fixed, the temperature $T$ is varied by changing $N_t$ at fixed lattice scale. The pressure of the hot QCD plasma is calculated by the integration of the trace anomaly with respect to $T$ at fixed lattice scale. This "$T$-integral method" is tested in quenched QCD on isotropic and anisotropic lattices and is shown to give reliable results especially at intermediate and low temperatures.

5 pages, ReVTeX, 4 figures, version to appear in PRD

Cited by in corpus (3)

• QCD Thermodynamics from the Lattice
• Trace Anomaly, Thermal Power Corrections and Dimension Two condensates in the deconfined phase
• Finite Volume Effects in Thermal Field Theory