Accelerating Staggered Fermion Dynamics with the Rational Hybrid Monte Carlo (RHMC) Algorithm

Preprint

6 October 2006

preprint
Published by arXiv in arXiv

Abstract

Improved staggered fermion formulations are a popular choice for lattice QCD calculations. Historically, the algorithm used for such calculations has been the inexact R algorithm, which has systematic errors that only vanish as the square of the integration step-size. We describe how the exact Rational Hybrid Monte Carlo (RHMC) algorithm may be used in this context, and show that for parameters corresponding to current state-of-the-art computations it leads to a factor of approximately seven decrease in cost as well as having no step-size errors.

Keywords

STAGGERED FERMION
SYSTEMATIC ERRORS
RATIONAL HYBRID
HYBRID MONTE
MONTE CARLO
LATTICE QCD
ALGORITHM
RHMC
QCD

All Related Versions

Version 1, 2006-10-06, ArXiv
Version 2, 2007-10-19, ArXiv
Published version: Physical Review D, 75 (1), 011502.

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