Adaptive Aggregation-based Domain Decomposition Multigrid for Twisted Mass Fermions

Adaptive Aggregation-based Domain Decomposition Multigrid for Twisted Mass Fermions
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基于自适应聚合的扭曲质量费米子域分解多重网格

DOI:
10.1103/physrevd.94.114509
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发表时间:
2016
期刊:
影响因子:
5
通讯作者:
M. Rottmann
M. Rottmann
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
C. Alexandrou;S. Bacchio;J. Finkenrath;A. Frommer;K. Kahl;M. Rottmann

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将基于自适应聚集的域分解多重网格方法(arXiv:1303.1377)扩展到两种简并的扭曲质量费米子。通过对参数的微调,我们实现了与共轭梯度算法相比,对介子质量物理值的加速达数百倍。对聚集参数进行了深入的分析,为独立于费米子离散化的晶格QCD的多网格方法提供了新的见解。
The Adaptive Aggregation-based Domain Decomposition Multigrid method (arXiv:1303.1377) is extended for two degenerate flavors of twisted mass fermions. By fine-tuning the parameters we achieve a speed-up of the order of hundred times compared to the conjugate gradient algorithm for the physical value of the pion mass. A thorough analysis of the aggregation parameters is presented, which provides a novel insight into multigrid methods for lattice QCD independently of the fermion discretization.
DOI: 10.1137/130919507
发表时间: 2013-03
期刊: SIAM J. Sci. Comput.
影响因子: --
作者:
A. Frommer;K. Kahl;S. Krieg;B. Leder;M. Rottmann
通讯作者: A. Frommer;K. Kahl;S. Krieg;B. Leder;M. Rottmann
Nf = 2 晶格 QCD 的核子等矢量耦合
DOI: 10.1103/physrevd.91.054501
发表时间: 2015
期刊: Physical Review D
影响因子: 5
作者:
G.S. Bali
通讯作者: G.S. Bali