On the temperature dependence of the electrical conductivity in hot   quenched lattice QCD
  Extending our recent work, we report on a calculation of the vector current correlation function for light valence quarks in the deconfined phase of quenched QCD in the temperature range 1.16Tc<T<2.98Tc. After performing a systematic analysis of the in fluence of cut-off effects on light quark meson correlators using clover improved Wilson fermions, we discuss resulting constraints on the electrical conductivity in a quark gluon plasma. 
Anthony Francis and Olaf Kaczmarek
hep-lat hep-ph