Electric and Magnetic Fluxes in SU(2) Yang-Mills Theory
  We measure the free energies in SU(2) of static fundamental charges and center monopoles. Dual to temporal center fluxes, the former provide a well-defined (dis)order parameter for deconfinement. In contrast, the monopole free energies vanish in the thermodynamic limit at all temperatures and are thus irrelevant for the transition. 
Lorenz von Smekal (1), with Philippe de Forcrand (2) ((1) University   Erlangen-Nuremberg, (2) ETH Zurich and CERN)