Instability in the molecular dynamics step of a hybrid Monte Carlo algorithm in dynamical fermion lattice QCD simulations

Joó, Bálint, Pendleton, Brian, Kennedy, Anthony D, Irving, Alan C, Sexton, James C, Pickles, Stephen M and Booth, Stephen P (2000) Instability in the molecular dynamics step of a hybrid Monte Carlo algorithm in dynamical fermion lattice QCD simulations. Physical Review D, 62 (11). 114501-.

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Abstract

We investigate instability and reversibility within hybrid Monte Carlo simulations using a nonperturbatively improved Wilson action. We demonstrate the onset of instability as tolerance parameters and molecular dynamics step sizes are varied. We compare these findings with theoretical expectations and present limits on simulation parameters within which a stable and reversible algorithm is obtained for physically relevant simulations. Results of optimization experiments with respect to tolerance parameters are also presented.

Item Type:	Article
Additional Information:	LTH 454. Additional citation information: PHYSICAL REVIEW D, VOLUME 62, 114501; 0556-2821/2000/62(11)/114501(15). 15 pages. Published: Published 17 October 2000. Issue: December 2000.
Uncontrolled Keywords:	WILSON FERMIONS
Subjects:	?? QC ??
Divisions:	Faculty of Science and Engineering > School of Physical Sciences > Mathematical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	31 Oct 2008 16:17
Last Modified:	16 Mar 2024 06:36
DOI:	10.1103/physrevd.62.114501
Publisher's Statement :	©2000 The American Physical Society
Related URLs:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/617