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The Slab Method to Measure the Topological Susceptibility

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arxiv 1610.00685 v2 pith:2TKNLH2K submitted 2016-10-03 hep-lat cond-mat.stat-mechhep-ph

classification hep-latcond-mat.stat-mechhep-ph
keywords topologicalmeasuremethodresultsslabconfigurationsflownumerical
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In simulations of a model with topological sectors, algorithms which proceed in small update steps tend to get stuck in one sector, especially on fine lattices. This distorts the numerical results; in particular it is not straightforward to measure the topological susceptibility chi_t. We test a method to measure chi_t even if configurations from only one sector are available. It is based on the topological charges in sub-volumes, which we denote as "slab". This enables the evaluation of chi_t, as we demonstrate with numerical results for non-linear sigma-models and for 2-flavour QCD. In the latter case, the gradient flow is applied for the smoothing of the gauge configurations, and the slab method results for chi_t are stable over a broad range of flow times.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. A Fluctuation Theory of Topological Susceptibility

    hep-lat 2019-08 reject novelty 3.0 of 10

    The claim that ChPT topological susceptibility fluctuations are always non-interacting relies on a determinant that the paper's own equations show to be nonzero, and the slab sub-volume analysis contains further algeb...

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