24-30 July 2016
Highfield Campus, University of Southampton
Europe/London timezone

The Slab Method to Measure the Topological Susceptibility

25 Jul 2016, 14:15
20m
Building 67 Room 1003 (Highfield Campus, University of Southampton)

Building 67 Room 1003

Highfield Campus, University of Southampton

Highfield Campus, Southampton SO17 1BJ, UK
Talk Theoretical Developments Theoretical Developments

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)

Presentation Materials