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arXiv 1312.4698physics.comp-phphysics.chem-phquant-ph
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图形处理单元加速半经典初值表示分子动力学

Graphics processing units accelerated semiclassical initial value representation molecular dynamics

Dario Tamascelli, Francesco S. Dambrosio, Riccardo Conte, Michele Ceotto

摘要:

本文介绍了一种用于振动分子光谱计算的半经典初值表示(SC-IVR)传播子的图形处理单元(GPU)实现。时间平均制定的SC-IVR功率谱计算。提供了关于半经典代码的GPU实现的细节。考虑了原子数量不断增加的四种分子,GPU计算的振动频率与基准值完全匹配。讨论了两个GPU(NVIDIA Tesla C2075和Kepler K20)分别与两个CPU(Intel Core i5和Intel Xeon E5- 2687 W)的计算时间缩放以及与GPU实现相关的关键问题。计算时间和功耗的减少是显着的,半经典GPU计算被证明是环境友好的。

英文摘要:

This paper presents a Graphics Processing Units (GPUs) implementation of the Semiclassical Initial Value Representation (SC-IVR) propagator for vibrational molecular spectroscopy calculations. The time-averaging formulation of the SC-IVR for power spectrum calculations is employed. Details about the GPU implementation of the semiclassical code are provided. Four molecules with an increasing number of atoms are considered and the GPU-calculated vibrational frequencies perfectly match the benchmark values. The computational time scaling of two GPUs (NVIDIA Tesla C2075 and Kepler K20) respectively versus two CPUs (Intel Core i5 and Intel Xeon E5-2687W) and the critical issues related to the GPU implementation are discussed. The resulting reduction in computational time and power consumption is significant and semiclassical GPU calculations are shown to be environment friendly.

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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