Gauge action improvement and smearing

Details Gauge action improvement and smearing Gauge action improvement and smearing

2004-09-23

arxiv.org/abs/hep-lat/0409141v2

Comput.Phys.Commun. 172 (2005) 163-186

Physics

High Energy Physics

High Energy Physics - Lattice

24 pages, 12 figures; v2: several new Refs

Scientific paper

10.1016/j.cpc.2005.06.011

The effect of repeatedly smearing SU(3) gauge configurations is investigated. Six gauge actions (Wilson, Symanzik, Iwasaki, DBW2, Beinlich-Karsch-Laermann, Langfeld; combined with a direct SU(3)-overrelaxation step) and three smearings (APE, HYP, EXP) are compared. The impact on large Wilson loops is monitored, confirming the signal-to-noise prediction by Lepage. The fat-link definition of the ``naive'' topological charge proves most useful on improved action ensembles.

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