Volume 256 - 34th annual International Symposium on Lattice Field Theory (LATTICE2016) - Theoretical Developments
The Slab Method to Measure the Topological Susceptibility
W. Bietenholz*, K. Cichy, P. de Forcrand, A. Dromard and U. Gerber
*: corresponding author
Full text: pdf
Pre-published on: February 18, 2017
Published on: March 24, 2017
Abstract
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 ``slabs''.
This enables the evaluation of chi_t, as we demonstrate
with numerical results for non-linear sigma-models and for
2-flavour QCD.
DOI: https://doi.org/10.22323/1.256.0321
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