Finite temperature gluon propagator in Landau gauge: non-zero Matsubara frequencies and spectral densities
We report on the lattice computation of the Landau gauge gluon propagator at finite temperature, including the non-zero Matsubara frequencies. Furthermore, the Källén-Lehmann representation is inverted and the corresponding spectral density evaluated using a Tikhonov regularisation together with the Morozov discrepancy principle. Implications for gluon confinement are also discussed.
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Nonzero Temperature and Density