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

Michele Della Morte, Roland Hoffmann, Francesco Knechtli, Ulli Wolff

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

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.
OriginalsprogUdefineret/Ukendt
TidsskriftComput.Phys.Commun.
DOI
StatusUdgivet - 19. maj 2004

Bibliografisk note

19 pages, 12 figures, Sec. 2 extended, few references added. Accepted for publication in Comp. Phys. Comm

Emneord

  • hep-lat

Citer dette

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Impact of large cutoff-effects on algorithms for improved Wilson fermions. / Morte, Michele Della; Hoffmann, Roland; Knechtli, Francesco; Wolff, Ulli.

I: Comput.Phys.Commun., 19.05.2004.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Impact of large cutoff-effects on algorithms for improved Wilson fermions

AU - Morte, Michele Della

AU - Hoffmann, Roland

AU - Knechtli, Francesco

AU - Wolff, Ulli

N1 - 19 pages, 12 figures, Sec. 2 extended, few references added. Accepted for publication in Comp. Phys. Comm

PY - 2004/5/19

Y1 - 2004/5/19

N2 - 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.

AB - 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.

KW - hep-lat

U2 - 10.1016/j.cpc.2004.09.009

DO - 10.1016/j.cpc.2004.09.009

M3 - Tidsskriftartikel

JO - Computer Physics Communications

JF - Computer Physics Communications

SN - 0010-4655

ER -