Loop functions at finite temperature from perturbation theory to lattice QCD

Abstract

We review our present knowledge of the Polyakov loop, the correlator of Polyakov loops and the singlet correlator in thermal QCD from the point of view of perturbation theory and lattice QCD.

Comments: Invited talk at the XIIIth Quark Confinement and the Hadron Spectrum conference. 12 pages, 13 figures