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Cutoff–effects in the spectrum of dynamical Wilson fermions

✍ Scribed by M. Della Morte; R. Hoffmann; F. Knechtli; U. Wolff

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
128 KB
Volume
140
Category
Article
ISSN
0920-5632

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✦ Synopsis

We investigate the low-lying eigenvalues of the improved Wilson-Dirac operator in the Schrödinger functional with two dynamical quark flavors. At a lattice spacing of approximately 0.1 fm we find more very small eigenvalues than in the quenched case. These cause problems with HMC-type algorithms and in the evaluation of fermionic correlation functions. Through a simulation at a finer lattice spacing we are able to establish their nature as cutoff-effects.

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