• Publications
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Universal results from an alternate random-matrix model for QCD with a baryon chemical potential.
  • J. Osborn
  • Physics, Medicine
    Physical review letters
  • 11 March 2004
TLDR
A new non-Hermitian random-matrix model for QCD with a baryon chemical potential that interpolates between the Wigner-Dyson and Ginibre ensembles and can be scaled to remove the effects of the chemical potential from all thermodynamic quantities until the finite density phase transition is reached.
Lattice QCD ensembles with four flavors of highly improved staggered quarks
We present results from our simulations of quantum chromodynamics with four flavors of quarks: u, d, s, and c. These simulations are performed with a one-loop Symanzik improved gauge action and the
From chiral random matrix theory to chiral perturbation theory
Abstract We study the spectrum of the QCD Dirac operator by means of the valence quark mass dependence of the chiral condensate in partially quenched Chiral Perturbation Theory (pqChPT) in the
Adaptive multigrid algorithm for the lattice Wilson-Dirac operator.
TLDR
An adaptive multigrid solver for application to the non-Hermitian Wilson-Dirac system of QCD is presented, demonstrating that the algorithm nearly eliminates critical slowing down in the chiral limit and that it has weak dependence on the lattice volume.
QCD thermodynamics with three flavors of improved staggered quarks
We report on a study of QCD thermodynamics with three flavors of quarks, using a Symanzik improved gauge action and the Asqtad O(a{sup 2}) improved staggered quark action. Simulations were carried
High-precision lattice QCD confronts experiment.
TLDR
To test the Symanzik-improved staggered-quark discretization formalism, experiment with a variety of nonperturbative calculations in QCD drawn from a restricted set of "gold-plated" quantities finds agreement to within statistical and systematic errors of 3% or less.
Results from the MILC collaboration's SU(3) chiral perturbation theory analysis
We present the status of the MILC collaboration's analysis of the light pseudoscalar meson sector with SU(3) chiral fits. The analysis includes data from new ensembles with smaller lattice spacing,
Adaptive multigrid algorithm for lattice QCD.
TLDR
A new multigrid solver that is suitable for the Dirac operator in the presence of disordered gauge fields is presented that has weak dependence on the gauge coupling and exhibits very little critical slowing down in the chiral limit.
Multigrid solver for clover fermions
We present an adaptive multigrid Dirac solver developed for Wilson clover fermions which offers order-of-magnitude reductions in solution time compared to conventional Krylov solvers. The solver
Light pseudoscalar decay constants, quark masses, and low energy constants from three-flavor lattice QCD
As part of our program of lattice simulations of three-flavor QCD with improved staggered quarks, we have calculated pseudoscalar meson masses and decay constants for a range of valence quark masses
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