Multi-Grid Lanczos (1710.06884v1)

Published 18 Oct 2017 in hep-lat

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.

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