格点量子色动力学中的涂抹和滤波方法的定量比较
Smearing and filtering methods in lattice QCD - a quantitative comparison
摘要：
我们系统地比较了三种用于从格点规范配置中提取拓扑激发的过滤方法，即涂抹，拉普拉斯过滤和过滤的费米子拓扑荷（具有手性改进的费米子）。这些技术中的每一种都引入了模糊性，如其参数依赖性。然而，我们发现，所有这些方法可以在广泛的过滤水平上相互调整，它们揭示了非常相似的拓扑结构。对于这些常见的结构，我们发现一个有趣的幂律关系的过滤拓扑电荷的集群的数量和包装分数。
英文摘要：
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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