Collaborative Research: Elements: Lattice QCD software for nuclear physics on heterogeneous architectures

合作研究：Elements：用于异构架构核物理的 Lattice QCD 软件

• 批准号: 2311430
• 负责人: Colin Morningstar
• 金额: $ 35.86万
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2311430&HistoricalAwards=false
• 关键词: Collaborative; Research; Elements; Lattice; QCD

Nucleons (protons and neutrons) make up atomic nuclei and are a common building block of all matter in the universe. To better understand atomic nuclei, as well as to assist current experiments to find new particle physics and to understand particles known as neutrinos, it is important to carry out calculations of nucleons interacting with not only other nucleons but other particles in nature, such as electrons, muons, and mesons. The development of optimized software to carry out such computations on modern GPU-accelerated supercomputer systems is pursued.The physics of hadron-hadron interactions can be studied using Monte Carlo estimates of path integrals involving quark and gluon fields on a space-time lattice. Baryon-meson and baryon-baryon scattering phase shifts can be computed, yielding important information on hadron structure. Form factors involving the nucleon and transitions through the Delta baryon are particularly important since they are crucial to accelerator-based neutrino experiments, such as the Deep Underground Neutrino Experiment (DUNE). New computational techniques, such as the stochastic LapH method, have made possible such computations in lattice quantum chromodynamics (LQCD). A key, but computationally intensive, ingredient in such computations is the evaluation of individual baryon sources and sinks. One goal of this work is the development of highly-optimized software to evaluate baryon sources/sinks on modern GPU-accelerated architectures. A plethora of tensor contractions are needed in the end stages of such scattering calculations, which are best performed in separate program executions requiring different wall times and numbers of computing processors. Effectively bundling such numerous runs together into a handful of batch jobs on supercomputer systems is crucial in the work flow of these computations. This work will also develop the software to efficiently carry out this bundling.This award by the Office of Advanced Cyberinfrastructure is jointly supported by the Physics at the Information Frontier program in the Division of Physics within the Directorate for Mathematical and Physical Sciences.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

核（质子和中子）组成原子核，是宇宙中所有物质的常见基础。为了更好地理解原子核，并协助当前的实验找到新的粒子物理学并理解称为中微子的颗粒，重要的是要对不仅与其他核子，例如电子，muons和erson的其他核子相互作用进行计算，这一点很重要。开发了对现代GPU加速超级计算机系统进行此类计算的优化软件的开发。可以使用涉及Quark和Gluon Fields在时空lattice上的Quark和Gluon场的蒙特卡洛估算值来研究强子 - 哈德隆相互作用的物理。可以计算Baryon-Meson和Baryon-Baryon散射相移，从而获得有关强子结构的重要信息。涉及核子和通过三角洲重子的过渡的形式因素尤为重要，因为它们对于基于加速器的中微子实验至关重要，例如深层地下中微子实验（Dune）。新的计算技术，例如随机LAPH方法，已使晶格量子染色体动力学（LQCD）中的这种计算成为可能。在此类计算中，关键但在计算中的成分是对单个重子来源和下沉的评估。这项工作的目标之一是开发高度优化的软件，以评估现代GPU加速体系结构的Baryon来源/汇。在此类散射计算的结束阶段需要大量的张量收缩，这些计算最能在需要不同的墙壁时间和数量计算处理器的单独执行中执行。在超级计算机系统上，有效地将如此多的运行捆绑在一起，将这些运行捆绑在一起，对于这些计算的工作流程至关重要。 This work will also develop the software to efficiently carry out this bundling.This award by the Office of Advanced Cyber​​infrastructure is jointly supported by the Physics at the Information Frontier program in the Division of Physics within the Directorate for Mathematical and Physical Sciences.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.