Multigrid solver for clover fermions
High Energy Physics - Lattice
2011-05-25 v1
Abstract
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 incorporates even-odd preconditioning and mixed precision to solve the Dirac equation to double precision accuracy and shows only a mild increase in time to solution for decreasing quark mass. We show actual time to solution on production lattices in comparison to conventional Krylov solvers and will also discuss the setup process and its relative cost to the total solution time.
Cite
@article{arxiv.1011.2775,
title = {Multigrid solver for clover fermions},
author = {J. C. Osborn and R. Babich and J. Brannick and R. C. Brower and M. A. Clark and S. D. Cohen and C. Rebbi},
journal= {arXiv preprint arXiv:1011.2775},
year = {2011}
}
Comments
7 pages, 8 figures, talk presented at the XXVIII International Symposium on Lattice Field Theory, June 14-19 2010, Villasimius, Italy