Jul 24 – 30, 2016
Highfield Campus, University of Southampton
Europe/London timezone

New Noise Subtraction Methods in Lattice QCD

Jul 26, 2016, 8:00 PM
Highfield Campus, University of Southampton

Highfield Campus, University of Southampton

Highfield Campus, Southampton SO17 1BJ, UK
Poster Algorithms and Machines Poster


Mr Suman Baral (Baylor University)


Lattice QCD calculations of quark loop operators are extremely time-consuming to evaluate. To calculate these diagrams we use stochastic noise methods, which employ a randomly generated set of noise vectors to project out physical signals. This is done with linear equation solvers like GMRES-DR (Generalized Minimum RESidual algorithm-Deflated and Restarted) for the first noise, and GMRES-Proj (similar algorithm projected over eigenvectors) for remaining noises. In this context, we are attempting to employ matrix deflation algorithms to reduce statistical uncertainty in these time-consuming lattice calculations. In addition, we are developing noise suppression algorithms using polynomial subtraction techniques, as well as combining deflation and polynomial methods in an original way.

Primary authors

Mr Suman Baral (Baylor University) Dr Walter Wilcox (Baylor University)

Presentation materials