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Lattice Landau gauge gluon propagator at finite temperature: non-zero Matsubara frequencies and spectral densities

Authors: Paulo J. Silva, Orlando Oliveira, David Dudal, Martin Roelfs

Ref.: Acta Phys. Polon. Supp. 10, 995 (2017)

Abstract: The lattice Landau gauge gluon propagator at finite temperature is computed including the non-zero Matsubara frequencies. Furthermore, the Kallén-Lehmann representation is inverted and the corresponding spectral density evaluated using a Tikhonov regularisation together with the Moro- zov discrepancy principle. Implications for gluon confinement are discussed.

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