Topology and confinement at T \neq 0 : calorons with non-trivial   holonomy
  In this talk, relying on experience with various lattice filter techniques, we argue that the semiclassical structure of finite temperature gauge fields for T < T_c is dominated by calorons with non-trivial holonomy. By simulating a dilute gas of calorons with identical holonomy, superposed in the algebraic gauge, we are able to reproduce the confining properties below T_c up to distances r = O(4 fm} >> \rho (the caloron size). We compute Polyakov loop correlators as well as space-like Wilson loops for the fundamental and adjoint representation. The model parameters, including the holonomy, can be inferred from lattice results as functions of the temperature. 
P. Gerhold, E.-M. Ilgenfritz, M. M\"uller-Preussker   (Humboldt-Univ.Berlin), B.V. Martemyanov and A.I. Veselov (ITEP Moscow)