A multilevel algorithm for flow observables in gauge theories
High Energy Physics - Lattice
2016-04-13 v2
Abstract
We study the possibility of using multilevel algorithms for the computation of correlation functions of gradient flow observables. For each point in the correlation function an approximate flow is defined which depends only on links in a subset of the lattice. Together with a local action this allows for independent updates and consequently a convergence of the Monte Carlo process faster than the inverse square root of the number of measurements. We demonstrate the feasibility of this idea in the correlation functions of the topological charge and the energy density.
Cite
@article{arxiv.1601.07155,
title = {A multilevel algorithm for flow observables in gauge theories},
author = {Miguel García Vera and Stefan Schaefer},
journal= {arXiv preprint arXiv:1601.07155},
year = {2016}
}
Comments
Minor modifications to the text. Version accepted to be published in PRD. 18 pages, 5 figures