Local bosonic versus HMC --- a CPU cost comparison
High Energy Physics - Lattice
2009-10-30 v1
Abstract
We compare the CPU cost of HMC to various implementations of the Hermitean variant of L\"uscher's local bosonic algorithm (LBA) for 2D massive QED with two flavours of Wilson fermions. We carefully scan a 3-dimensional parameter subspace and find flat behaviour around the optimum. The gain factor of the LBA, as compared to HMC, is slightly smaller for the Re-weighting method than for the Metropolis variants and estimated to about 3.3 for the plaquette and 1.9 for the the meson correlator.
Cite
@article{arxiv.hep-lat/9709121,
title = {Local bosonic versus HMC --- a CPU cost comparison},
author = {Stephan Elser and Burkhard Bunk},
journal= {arXiv preprint arXiv:hep-lat/9709121},
year = {2009}
}
Comments
Talk presented at LATTICE97(algorithms), 3 pages, 3 Postscript figures, uses twoside, fleqn, espcrc2, epsf