Abstract
AbstractIn lattice calculations, the approach to the continuum limit is hindered by the severe freezing of the topological charge, which prevents ergodic sampling in configuration space. In order to significantly reduce the autocorrelation time of the topological charge, we develop a density of states approach with a smooth constraint and use it to study SU(3) pure Yang Mills gauge theory near the continuum limit. Our algorithm relies on simulated tempering across a range of couplings, which guarantees the decorrelation of the topological charge and ergodic sampling of topological sectors. Particular emphasis is placed on testing the accuracy, efficiency and scaling properties of the method. In their most conservative interpretation, our results provide firm evidence of a sizeable reduction of the exponent z related to the growth of the autocorrelation time as a function of the inverse lattice spacing.
DOI
10.1140/epjc/s10052-021-09161-1
Publication Date
2021-04-01
Publication Title
The European Physical Journal C
Volume
81
Issue
4
ISSN
1434-6044
Embargo Period
2021-08-12
Organisational Unit
School of Engineering, Computing and Mathematics
Recommended Citation
Cossu, G., Lancaster, D., Lucini, B., Pellegrini, R., & Rago, A. (2021) 'Ergodic sampling of the topological charge using the density of states', The European Physical Journal C, 81(4). Available at: https://doi.org/10.1140/epjc/s10052-021-09161-1
