Accelerating staggered-fermion dynamics with the rational hybrid Monte Carlo algorithm
Accelerating staggered-fermion dynamics with the rational hybrid Monte Carlo algorithm
复制标题
使用理性混合蒙特卡罗算法加速交错费米子动力学
DOI：
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复制
发表时间：
2006
期刊：
影响因子：
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通讯作者：
A. Kennedy
中科院分区：
文献类型：
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作者：
M. Clark;A. Kennedy
改进的交错费米子公式是格点QCD计算的一种常用方法。历史上，用于这种计算的算法一直是不精确的R算法，其具有仅随着积分步长的平方而消失的系统误差。我们描述了如何在这种情况下，可以使用精确的合理的混合蒙特卡罗（RHMC）算法，并表明，对于对应于当前最先进的计算的参数，它导致成本降低约7倍，以及没有步长误差。
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.