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arXiv · hep-lat/0405017

Impact of large cutoff-effects on algorithms for improved Wilson fermions

Michele Della Morte·Roland Hoffmann·Francesco Knechtli·Ulli Wolff
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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.

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Michele Della Morte, Roland Hoffmann, Francesco Knechtli, Ulli Wolff. 2004-09-22. Impact of large cutoff-effects on algorithms for improved Wilson fermions. https://doi.org/10.1016/j.cpc.2004.09.009

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