330 research outputs found
Using the Mass Storage System at ZIB within I3HP
In the framework of I3HP there are two Transnational Access Activities
related to Computational Hadron Physics. One of these activities is access to
the mass storage system at Konrad-Zuse-Zentrum fuer Informationstechnik Berlin
(ZIB). European lattice physics collaborations can apply for mass storage
capacity in order to store and share their configurations or other data (see
http://www.zib.de/i3hp/). In this paper formal and technical aspects of usage
as well as the conformance to the International Lattice DataGrid (ILDG) are
explained.Comment: Talk given at the Workshop on Computational Hadron Physics, Nicosia,
Cyprus, 14--17 September 200
Hadron masses from dynamical, non-perturbatively O(a) improved Wilson fermions
We present results on light hadron masses from simulations of full QCD and
report on experiences in running such simulations on a Hitachi SR8000-F1
supercomputer.Comment: Lattice 2000 (Spectrum), 4 pages, 6 eps figure
The Nambu-Jona-Lasinio model with staggered fermions
We investigate the neighbourhood of the chiral phase transition in a lattice
Nambu--Jona-Lasinio model, using both Monte Carlo methods and lattice
Schwinger-Dyson equations.Comment: Talks at LAT93, Dallas, U.S.A. Postscript file, 6 pages, figures
include
Cost of dynamical quark simulations: O(a) improved Wilson fermions
I report on cost estimates and algorithmic performance in simulations using 2
flavours of non-perturbatively O(a) improved Wilson quarks together with the
Wilson plaquette action.Comment: Contribution to Lattice2001 (panel discussion), 2 pages, 2 figure
Decorrelation of the topological charge in tempered Hybrid Monte Carlo simulations of QCD
We study the improvement of simulations of QCD with dynamical Wilson fermions
by combining the Hybrid Monte Carlo algorithm with parallel tempering. As an
indicator for decorrelation we use the topological charge.Comment: LATTICE99 (algorithms and machines
Resolution of the Landau pole problem in QED
We present new numerical results for the renormalized mass and coupling in
non-compact lattice QED with staggered fermions. Implications for the continuum
limit and the role of the Landau pole are discussed.Comment: 3 pages, talk presented by H. St\"uben at Lattice '97, Edinburg
Baryonic Flux in Quenched and Two-Flavor Dynamical QCD after Abelian projection
We study the distribution of color electric flux of the three-quark system in
quenched and full QCD (with N_f = 2 flavors of dynamical quarks) at zero and
finite temperature. To reduce ultra-violet fluctuations, the calculations are
done in the abelian projected theory fixed to the maximally abelian gauge. In
the confined phase we find clear evidence for a Y--shape flux tube surrounded
and formed by the solenoidal monopole current, in accordance with the dual
superconductor picture of confinement. In the deconfined, high temperature
phase monopoles cease to condense, and the distribution of the color electric
field becomes Coulomb--like.Comment: 21 pages, 15 figures, Latex, published version (4 figures added
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