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Comparing Clusters and Supercomputers for Lattice QCD
Steven Gottlieb
Since the development of the Beowulf project to build a parallel computer from commodity PC components, there have been many such clusters built. The MILC QCD code has been run on…
Benchmarking MILC code with OpenMP and MPI
Steven Gottlieb, Sonali Tamhankar
A trend in high performance computers that is becoming increasingly popular is the use of symmetric multiprocessing (SMP) rather than the older paradigm of MPP. MPI codes that ran…
f_B for Various Actions : Approaching the Continuum Limit with Dynamical Fermions
C. Bernard, S. Datta, C. DeTar +7
We present results for pseudoscalar decay constants of heavy-light mesons using both quenched and N_f = 2 dynamical fermion configurations. A variety of fermion actions is investig…
Zero Temperature String Breaking with Staggered Quarks
MILC Collaboration, C. Bernard, T. Burch +8
The separation of a heavy quark and antiquark pair leads to the formation of a tube of flux, or "string", which should break in the presence of light quark-antiquark pairs. This ex…
Quark Loop Effects with an Improved Staggered Action
MILC Collaboration, C. Bernard, T. Burch +7
We have been studying effects of dynamical quarks on various hadronic observables, using our recently formulated improvement for staggered fermions. To illustrate improvement, we s…
The static quark potential in three flavor QCD
C. Bernard, T. Burch, K. Orginos +7
We study the effects of dynamical quarks on the static quark potential at distances shorter than those where string breaking is expected. Quenched calculations and calculations wit…