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arXiv 1905.01348physics.comp-phcond-mat.mtrl-sci
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基于Summit的杂化泛函并行输运含时密度泛函理论计算

Parallel Transport Time-Dependent Density Functional Theory Calculations with Hybrid Functional on Summit

Weile Jia, Lin-Wang Wang, Lin Lin

摘要:

实时含时交换关联密度泛函理论(rt-TDDFT)在化学和材料科学模拟中有着广泛的应用。然而,它可能比传统的基态DFT模拟昂贵数千倍,因此仅限于小系统。在本文中,我们加速混合功能的rt-TDDFT计算使用并行传输规范的形式主义,和GPU的实现首脑会议。我们的实现可以有效地扩展到786个GPU,用于具有1536个硅原子的大型系统,并且挂钟时间仅为每飞秒1.5小时。这种前所未有的速度使得使用rt-TDDFT和混合泛函能够模拟具有超过1000个原子的大型系统。

英文摘要:

Real-time time-dependent density functional theory (rt-TDDFT) with hybrid exchange-correlation functional has wide-ranging applications in chemistry and material science simulations. However, it can be thousands of times more expensive than a conventional ground state DFT simulation, hence is limited to small systems. In this paper, we accelerate hybrid functional rt-TDDFT calculations using the parallel transport gauge formalism, and the GPU implementation on Summit. Our implementation can efficiently scale to 786 GPUs for a large system with 1536 silicon atoms, and the wall clock time is only 1.5 hours per femtosecond. This unprecedented speed enables the simulation of large systems with more than 1000 atoms using rt-TDDFT and hybrid functional.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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