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We study thermodynamics of SU(3) gauge theory at fixed scales on the lattice,where we vary temperature by changing the temporal lattice sizeN_t=(Ta_t)^{-1}. In the fixed scale approach, finite temperature simulationsare performed on common lattice spacings and spatial volumes. Consequently, wecan isolate thermal effects in observables from other uncertainties, such aslattice artifact, renormalization factor, and spatial volume effect.Furthermore, in the EOS calculations, the fixed scale approach is able toreduce computational costs for zero temperature subtraction and parametersearch to find lines of constant physics, which are demanding in full QCDsimulations. As a test of the approach, we study the thermodynamics of theSU(3) gauge theory on isotropic and anisotropic lattices. In addition to theequation of state, we calculate the critical temperature and the static quarkfree energy at a fixed scale.

Thermodynamics of SU(3) gauge theory at fixed lattice spacing