Impact of large cutoff-effects on algorithms for improved Wilson fermions
arXiv:hep-lat/0405017 · doi:10.1016/j.cpc.2004.09.009
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.
arXiv comment19 pages, 12 figures, Sec. 2 extended, few references added. Accepted for publication in Comp. Phys. Comm
References in corpus (29)
- Chiral symmetry and O(a) improvement in lattice QCD
- The Schrödinger Functional - a Renormalizable Probe for Non-Abelian Gauge Theories
- Non-perturbative O(a) improvement of lattice QCD
- Locality properties of Neuberger's lattice Dirac operator
- Monte Carlo errors with less errors
- Non-perturbative quark mass renormalization in quenched lattice QCD
- Speeding up the Hybrid-Monte-Carlo algorithm for dynamical fermions
- On the Schroedinger functional in QCD
- O(a) improvement of the axial current in lattice QCD to one-loop order of perturbation theory
- O(a) improvement of lattice QCD with two flavors of Wilson quarks
- Further results on O(a) improved lattice QCD to one-loop order of perturbation theory
- Speeding up Lattice QCD simulations with clover-improved Wilson 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
- Two Loop Computation of the Schroedinger Functional in Lattice QCD
- A Polynomial Hybrid Monte Carlo Algorithm
- First results on the running coupling in QCD with two massless flavours
- Fast Fermion Monte Carlo
- Investigating and Optimizing the Chiral Properties of Lattice Fermion Actions
- Instability in the Molecular Dynamics Step of Hybrid Monte Carlo in Dynamical Fermion Lattice QCD Simulations
- Simulating the Schroedinger functional with two pseudo-fermions
- Wilson fermions with chirally twisted mass
- Scaling investigation of renormalized correlation functions in O(a) improved quenched lattice QCD
- Large cutoff effects of dynamical Wilson fermions
- Recent results on the running coupling in QCD with two massless flavours
- Exploring QCD at small sea quark masses with improved Wilson-type quarks
- Exploring two non-perturbative definitions of
- Non-perturbative renormalization of the axial current with improved Wilson quarks
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- Non-perturbative renormalization of the axial current with dynamical Wilson fermions
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- Non-perturbative improvement of the axial current for dynamical Wilson fermions
- QCD with light Wilson quarks on fine lattices (II): DD-HMC simulations and data analysis
- On cutoff effects in lattice QCD from short to long distances
- Vector form factor in K_l3 semileptonic decay with two flavors of dynamical domain-wall quarks
- Non-perturbative improvement of quark mass renormalization in two-flavour lattice QCD
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