Department of Chemistry, Chicago Center for Theoretical Chemistry, James Franck Institute, and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States.
J Chem Theory Comput. 2022 Feb 8;18(2):599-604. doi: 10.1021/acs.jctc.1c01085. Epub 2022 Jan 4.
molecular dynamics (AIMD) has become one of the most popular and robust approaches for modeling complicated chemical, liquid, and material systems. However, the formidable computational cost often limits its widespread application in simulations of the largest-scale systems. The situation becomes even more severe in cases where the hydrogen nuclei may be better described as quantized particles using a path integral representation. Here, we present a computational approach that combines machine learning with recent advances in path integral contraction schemes, and we achieve a 2 orders of magnitude acceleration over direct path integral AIMD simulation while at the same time maintaining its accuracy.
分子动力学(AIMD)已经成为建模复杂化学、液体和材料系统的最流行和最强大的方法之一。然而,巨大的计算成本通常限制了其在最大规模系统模拟中的广泛应用。在氢原子核最好用路径积分表示来描述为量子化粒子的情况下,情况变得更加严重。在这里,我们提出了一种计算方法,将机器学习与最近的路径积分收缩方案的进展相结合,并且在保持其准确性的同时,与直接的路径积分 AIMD 模拟相比实现了 2 个数量级的加速。