The electrical conductivity and soft photon emissivity of the QCD plasma
arXiv:hep-lat/0301006 · doi:10.1016/j.physletb.2004.05.079
Abstract
The electrical conductivity in the hot phase of the QCD plasma is extracted from a quenched lattice measurement of the Euclidean time vector correlator for 1.5 < T/T_c < 3. The spectral density in the vicinity of the origin is examined using a method specially adapted to this region, and a peak at small energies is seen. The continuum limit of the electrical conductivity, and the closely related soft photon emissivity of the QCD plasma, are then extracted from a fit to the Fourier transform of the temporal vector correlator.
4 pages, 3 figures; estimate of shear viscosity & comparison with AdS/CFT added