Möbius domain-wall fermions on gradient-flowed dynamical HISQ ensembles
Möbius domain-wall fermions on gradient-flowed dynamical HISQ ensembles
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DOI：
10.1103/physrevd.96.054513
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发表时间：
2017-01
影响因子：
5
通讯作者：
E. Berkowitz;C. Bouchard;C. C. Chang-C.;M. A. Clark;-B.;Joo;T. Kurth;C. Monahan;A. Nicholson;K. Orginos;-E.;Rinaldi;P. Vranas;A. Walker-Loud
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作者：
E. Berkowitz;C. Bouchard;C. C. Chang-C.;M. A. Clark;-B.;Joo;T. Kurth;C. Monahan;A. Nicholson;K. Orginos;-E.;Rinaldi;P. Vranas;A. Walker-Loud
作者：Berkowitz，E; Bouchard，C; Chang，CC; Clark，MA; Joo，B; Kurth，T;莫纳汉角;尼科尔森，A; Orginos，K; Rinaldi，E; Vranas，P; Walker-Loud，A|摘要：© 2017美国物理学会。我们报告的显着特点的混合晶格QCD行动使用价莫比乌斯域壁费米子解决动态Nf = 2 + 1 + 1高度改进的交错夸克海夸克合奏产生的MILC合作。利用梯度流方案首先涂抹高度改进的交错夸克组态，价费米子的近似手征对称性得到显着改善。针对NVIDIA GPU加速计算节点优化的高效QUDA库减轻了Mobius畴壁反转的更大数值成本。我们已经在Chroma中创建了一个优化的QUDA求解器的接口。我们提供了调整参数的行动和性能的QUDA使用合奏与晶格间距a <${0.15，0.12，0.09} fm和π介子质量m π <${310，220，130} MeV。我们还生成了两个新的合奏，其fm和m π {400，350} MeV。在晶格单位中固定流动时间tgf = 1的情况下，价费米子的剩余手征对称性破缺在所有系综上保持在轻夸克质量的10%以下，mres0.1 × ml，第五维L5和畴壁高度M5 ≤ 1.3的值适中。作为一个基准计算，我们进行了连续，无限体积，物理π介子和K介子质量外推FK ±/F π ±，并证明我们的结果是独立的流动时间和一致的FLAG确定这个量在小于一个标准偏差的水平。
Author(s): Berkowitz, E; Bouchard, C; Chang, CC; Clark, MA; Joo, B; Kurth, T; Monahan, C; Nicholson, A; Orginos, K; Rinaldi, E; Vranas, P; Walker-Loud, A | Abstract: © 2017 American Physical Society. We report on salient features of a mixed lattice QCD action using valence Mobius domain-wall fermions solved on the dynamical Nf=2+1+1 highly improved staggered quark sea-quark ensembles generated by the MILC Collaboration. The approximate chiral symmetry properties of the valence fermions are shown to be significantly improved by utilizing the gradient-flow scheme to first smear the highly improved staggered quark configurations. The greater numerical cost of the Mobius domain-wall inversions is mitigated by the highly efficient QUDA library optimized for NVIDIA GPU accelerated compute nodes. We have created an interface to this optimized QUDA solver in Chroma. We provide tuned parameters of the action and performance of QUDA using ensembles with the lattice spacings a≃{0.15,0.12,0.09} fm and pion masses mπ≃{310,220,130} MeV. We have additionally generated two new ensembles with a∼0.12 fm and mπ∼{400,350} MeV. With a fixed flow time of tgf=1 in lattice units, the residual chiral symmetry breaking of the valence fermions is kept below 10% of the light quark mass on all ensembles, mres0.1×ml, with moderate values of the fifth dimension L5 and a domain-wall height M5≤1.3. As a benchmark calculation, we perform a continuum, infinite volume, physical pion and kaon mass extrapolation of FK±/Fπ± and demonstrate our results are independent of flow time and consistent with the FLAG determination of this quantity at the level of less than one standard deviation.