arXiv:1710.06884·v1·High Energy Physics — Lattice
Multi-Grid Lanczos
M. A. Clark🇺🇸 · Chulwoo Jung🇺🇸 · Christoph Lehner🇺🇸
Abstract
We present a Lanczos algorithm utilizing multiple grids that reduces the memory requirements both on disk and in working memory by one order of magnitude for RBC/UKQCD's 48I and 64I ensembles at the physical pion mass. The precision of the resulting eigenvectors is on par with exact deflation.
Comments: 6 pages, 7 figures; Talk given at the 35th International Symposium on Lattice Field Theory, 18-24 June 2017, Granada, Spain