Speaker
Dr
Wolfgang Bietenholz
(UNAM, Mexico)
Description
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.
Here 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''. Under
suitable circumstances, this enables the evaluation of chi_t,
as we demonstrate with numerical data for non-linear sigma-models
and 2-flavor QCD.
Primary author
Dr
Wolfgang Bietenholz
(UNAM, Mexico)
Co-authors
Mr
Arthur Dromard
(Goethe Universitaet Frankfurt)
Dr
Krzysztof Cichy
(Goethe-University Frankfurt am Main)
Prof.
Marc Wagner
(Goethe University Frankfurt)
Prof.
Philippe de Forcrand
(ETH Zurich and CERN)
Dr
Urs Gerber
(UNAM, Mexico City and UMSNH Morelia)
