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
arXiv commentLattice2004(machines), 3 pages, 3 figures, talk by R.H
References in corpus (13)
- The Schrödinger Functional - a Renormalizable Probe for Non-Abelian Gauge Theories
- Monte Carlo errors with less errors
- Speeding up the Hybrid-Monte-Carlo algorithm for dynamical fermions
- Light hadron spectroscopy with two flavors of -improved dynamical quarks
- Effects of non-perturbatively improved dynamical fermions in QCD at fixed lattice spacing
- Precision computation of the strange quark's mass in quenched QCD
- A Polynomial Hybrid Monte Carlo Algorithm
- First results on the running coupling in QCD with two massless flavours
- Instability in the Molecular Dynamics Step of Hybrid Monte Carlo in Dynamical Fermion Lattice QCD Simulations
- Simulating the Schroedinger functional with two pseudo-fermions
- Large cutoff effects of dynamical Wilson fermions
- Impact of large cutoff-effects on algorithms for improved Wilson fermions
- Recent results on the running coupling in QCD with two massless flavours