Eigenspectrum Noise Subtraction Methods in Lattice QCD
High Energy Physics - Lattice
2010-01-26 v1
Abstract
We propose a new noise subtraction method, which we call "eigenspectrum subtraction", which uses low eigenmode information to suppress statistical noise at low quark mass. This is useful for lattice calculations involving disconnected loops or all-to-all propagators. It has significant advantages over perturbative subtraction methods. We compare unsubtracted, eigenspectrum and perturbative error bar results for the scalar operator on a small Wilson QCD matrix.
Cite
@article{arxiv.1001.4366,
title = {Eigenspectrum Noise Subtraction Methods in Lattice QCD},
author = {Victor Guerrero and Ronald B. Morgan and Walter Wilcox},
journal= {arXiv preprint arXiv:1001.4366},
year = {2010}
}
Comments
8 pages