The slab method to measure the topological susceptibility
Por:
Bietenholz W., Cichy K., De Forcrand P., Dromard A., Gerber U.
Publicada:
1 ene 2016
Categoría:
Multidisciplinary
Resumen:
In simulations of amodelwith topological sectors, algorithmswhich 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 ct. We test amethod to measure ?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 ct, as we demonstrate with numerical results for non-linear s -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 ct are stable over a broad range of flow times. Copyright owned by the author(s).
Filiaciones:
Bietenholz W.:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A.P. 70-543, Ciudad de México, C.P. 04510, Mexico
Cichy K.:
Goethe-Universität Frankfurt Am Main, Institut für Theoretische Physik, Max-von-Laue-Straße 1, Frankfurt am Main, D-60438, Germany
Faculty of Physics, Adam Mickiewicz University, Umultowska 85, Poznan, 61-614, Poland
De Forcrand P.:
Institut für Theoretische Physik, ETH Zürich, Zürich, CH-8093, Switzerland
CERN, Theory Division, Geneva 23, CH-1211, Switzerland
Dromard A.:
Goethe-Universität Frankfurt Am Main, Institut für Theoretische Physik, Max-von-Laue-Straße 1, Frankfurt am Main, D-60438, Germany
Institut für Theoretische Physik, Universität Regensburg, Regensburg, D-93040, Germany
Gerber U.:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A.P. 70-543, Ciudad de México, C.P. 04510, Mexico
Instituto de Física y Matemáticas, Universidad Michoacana de San Nicolás de Hidalgo, Apdo. Postal 2-82, Morelia, Michoacán, C.P. 58040, Mexico
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