Cutoff-effects in the spectrum of dynamical Wilson fermions
arXiv:hep-lat/0409005 · doi:10.1016/j.nuclphysbps.2004.11.349
Abstract
We investigate the low-lying eigenvalues of the improved Wilson-Dirac operator in the Schroedinger 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
Lattice2004(machines), 3 pages, 3 figures, talk by R.H