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arXiv 2011.00908hep-lat
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重叠拓扑电荷密度对Wilson质量参数的依赖性

The dependence of overlap topological charge density on Wilson mass parameter

Zhen Cheng, Jian-bo Zhang

摘要:

本文利用对称多探测源(SMP)方法,分析了重叠算符的拓扑电荷密度对重叠核中Wilson质量参数的依赖关系.我们观察到,非平凡的拓扑对象被删除的威尔逊质量的增加。比较了用SMP方法计算的拓扑电荷密度与用Wilson流方法计算的拓扑电荷密度。这两种方法的匹配过程中使用。我们发现,在不同Wilson流时的胶子定义和不同Wilson质量的费米定义之间,拓扑电荷密度存在最佳匹配。利用匹配过程,可以估计Wilson流在拓扑电荷密度计算中的适当流动时间。随着晶格间距$a$减小,适当的流动时间也减小,正如所预期的。

英文摘要:

In this paper, we analyze the dependence of the topological charge density from the overlap operator on the Wilson mass parameter in the overlap kernel by the symmetric multi-probing source (SMP) method. We observe that the non-trivial topological objects are removed as the Wilson mass is increased. A comparison of topological charge density calculated by the SMP method using fermionic definition with that of gluonic definition by the Wilson flow method is shown. A matching procedure for these two methods is used. We find that there is a best match for topological charge density between gluonic definition with varied Wilson flow time and fermionic definition with different Wilson mass. By using the matching procedure, the proper flow time of Wilson flow in the calculation of topological charge density can be estimated. As the lattice spacing $a$ decreases, the proper flow time also decreases, as expected.

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