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Evaluation of disconnected quark loops for hadron structure using GPUs

机译:使用GPU评估强子结构的非连续夸克循环

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摘要

A number of stochastic methods developed for the calculation of fermion loops are investigated and compared, in particular with respect to their efficiency when implemented on Graphics Processing Units (GPUs). We assess the performance of the various methods by studying the convergence and statistical accuracy obtained for observables that require a large number of stochastic noise vectors, such as the isoscalar nucleon axial charge. The various methods are also examined for the evaluation of sigma-terms where noise reduction techniques specific to the twisted mass formulation can be utilized thus reducing the required number of stochastic noise vectors.
机译:研究和比较了许多用于计算费米子环的随机方法,尤其是在图形处理单元(GPU)上实现时的效率方面。我们通过研究需要大量随机噪声向量(例如等量核子轴向电荷)的可观测物的收敛性和统计准确性,来评估各种方法的性能。还检查了各种方法以评估sigma项,其中可以利用扭曲质量公式的降噪技术,从而减少了所需的随机噪声矢量数量。

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