Gauge action improvement and smearing

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.

gauge field theory: SU(3)
lattice field theory: action
Wilson loop: ratio
charge: topological
numerical methods: Monte Carlo
numerical calculations: Monte Carlo

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Figures(0)

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