München 2009 – scientific programme

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T: Fachverband Teilchenphysik

T 24: Gittereichtheorie

T 24.3: Talk

Monday, March 9, 2009, 17:30–17:45, A021

Filtering methods in SU(3) lattice gauge theory — •Florian Gruber, Stefan Solbrig, Falk Bruckmann, and Andreas Schäfer — Institut für Theoretische Physik, Universität Regensburg,D-93040 Regensburg, Germany

We systematically compare filtering methods used to extract topological excitations from lattice gauge configurations. We show that there is a strong correlation of the topological charge densities obtained by APE and Stout smearing. Furthermore, a first quantitative analysis of quenched and dynamical configurations reveals a crucial difference of their topological structure. The topological charge density is much more fragmented, when dynamical quarks are present. This implies that smearing has to be handled with great care, not to destroy these characteristic structures.