Gauge potential singularities and the gluon condensate at finite temperatures

Details Gauge potential singularities and the gluon condensate at finite temperatures Gauge potential singularities and the gluon condensate at finite temperatures

2001-10-09

arxiv.org/abs/hep-lat/0110024v1

Nucl.Phys.Proc.Suppl. 106 (2002) 501-503

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, 2 figures, talk presented by K. Langfeld at the 19th International Symposium on Lattice Field Theory (LATTICE2001), B

Scientific paper

The continuum limit of SU(2) lattice gauge theory is carefully investigated at zero and at finite temperatures. It is found that the continuum gauge field has singularities originating from center degrees of freedom being discovered in Landau gauge. Our numerical results show that the density of these singularities properly extrapolates to a non-vanishing continuum limit. The action density of the non-trivial Z_2 links is tentatively identified with the gluon condensate. We find for temperatures larger than the deconfinement temperature that the thermal fluctuations of the embedded Z_2 gauge theory result in an increase of the gluon condensate with increasing temperature.

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