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

作     者：Bálint Joó Brian Pendleton Anthony D. Kennedy Alan C. Irving James C. Sexton Stephen M. Pickles Stephen P. Booth 

作者机构：Edinburgh Parallel Computing Centre (EPCC) The University of Edinburgh Edinburgh EH9 3JZ Scotland United Kingdom 

出 版 物：《Physical Review D》 (物理学评论D辑：粒子、场、重力与宇宙学)

年 卷 期：2000年第62卷第11期

页      面：114501-114501页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

摘      要：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.