Polynomial Subtraction Method for Disconnected Quark Loops
High Energy Physics - Lattice
2014-05-09 v1
Abstract
The polynomial subtraction method, a new numerical approach for reducing the noise variance of Lattice QCD disconnected matrix elements calculation, is introduced in this paper. We use the MinRes polynomial expansion of the QCD matrix as the approximation to the matrix inverse and get a significant reduction in the variance calculation. We compare our results with that of the perturbative subtraction and find that the new strategy yields a faster decrease in variance which increases with quark mass.
Keywords
Cite
@article{arxiv.1405.1763,
title = {Polynomial Subtraction Method for Disconnected Quark Loops},
author = {Quan Liu and Walter Wilcox and Ron Morgan},
journal= {arXiv preprint arXiv:1405.1763},
year = {2014}
}
Comments
17 pages, 13 figures