Smearing and filtering methods in lattice QCD - a quantitative comparison

Details Smearing and filtering methods in lattice QCD - a quantitative comparison Smearing and filtering methods in lattice QCD - a quantitative comparison

2007-10-02

arxiv.org/abs/0710.0480v2

PoSLAT2007:334,2007

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 4 figures, updated acknowledgments

Scientific paper

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.

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