Impact of large cutoff-effects on algorithms for improved Wilson fermions
High Energy Physics - Lattice
2009-11-10 v2
Abstract
As a feasibility study for a scaling test we investigate the behavior of algorithms for dynamical fermions in the N_f=2 Schroedinger functional at an intermediate volume of 1 fm^4. Simulations were performed using HMC with two pseudo-fermions and PHMC at lattice spacings of approximately 0.1 and 0.07 fm. We show that some algorithmic problems are due to large cutoff-effects in the spectrum of the improved Wilson-Dirac operator and disappear at the smaller lattice spacing. The problems discussed here are not expected to be specific to the Schroedinger functional.
Keywords
Cite
@article{arxiv.hep-lat/0405017,
title = {Impact of large cutoff-effects on algorithms for improved Wilson fermions},
author = {Michele Della Morte and Roland Hoffmann and Francesco Knechtli and Ulli Wolff},
journal= {arXiv preprint arXiv:hep-lat/0405017},
year = {2009}
}
Comments
19 pages, 12 figures, Sec. 2 extended, few references added. Accepted for publication in Comp. Phys. Comm