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Smearing and filtering methods in lattice QCD - a quantitative comparison by Solbrig, Stefan; Bruckmann, Falk; Gattringer, Christof; Ilgenfritz, Ernst-Michael; Müller-Preussker, Michael; Schäfer, Andreas is a scholarly article available to read on EtoBox.

What is Smearing and filtering methods in lattice QCD - a quantitative comparison about?

We systematically compare three filtering methods used to extract topological excitations from lattice gauge configurations, namely smearing, Laplace filtering and the filtered fermionic topological charge (with chirally improved fermions). Each of these techniques introduces ambiguities, like its parameter dependence. We show, however, that all these methods can be tuned to each other over a broad range of filtering levels and that they reveal very similar topological structures. For these common structures we find an interesting power-law relating the number and packing fraction of clusters of filtered topological charge.

Author

Solbrig, Stefan; Bruckmann, Falk; Gattringer, Christof; Ilgenfritz, Ernst-Michael; Müller-Preussker, Michael; Schäfer, Andreas

Published

2007

Language

EN