3 papers
hep-lat1999
Numerical Stability of Lanczos Methods
Eamonn Cahill, Alan Irving, Christopher Johnson +1
The Lanczos algorithm for matrix tridiagonalisation suffers from strong numerical instability in finite precision arithmetic when applied to evaluate matrix eigenvalues. The mechan…
hep-lat1998
Tuning Actions and Observables in Lattice QCD
Alan C. Irving, James C. Sexton, Eamonn Cahill +5
We propose a strategy for conducting lattice QCD simulations at fixed volume but variable quark mass so as to investigate the physical effects of dynamical fermions. We present det…
hep-lat1997
Approximate actions for dynamical fermions
Alan C. Irving, James C. Sexton, Eamonn Cahill
Recent developments and applications of approximate actions for full lattice QCD are described. We present first results based on the stochastic estimation of the fermion determina…