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Molecular force fields with gradient-domain machine learning (GDML): Comparison and synergies with classical force fields

Authors :
Alexandre Tkatchenko
Huziel E. Sauceda
Michael Gastegger
Klaus-Robert Müller
Stefan Chmiela
Source :
The Journal of chemical physics. 153(12)
Publication Year :
2020

Abstract

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in J. Chem. Phys. 153, 124109 (2020) and may be found at https://doi.org/10.1063/5.0023005.<br />Modern machine learning force fields (ML-FF) are able to yield energy and force predictions at the accuracy of high-level ab initio methods, but at a much lower computational cost. On the other hand, classical molecular mechanics force fields (MM-FF) employ fixed functional forms and tend to be less accurate, but considerably faster and transferable between molecules of the same class. In this work, we investigate how both approaches can complement each other. We contrast the ability of ML-FF for reconstructing dynamic and thermodynamic observables to MM-FFs in order to gain a qualitative understanding of the differences between the two approaches. This analysis enables us to modify the generalized AMBER force field by reparametrizing short-range and bonded interactions with more expressive terms to make them more accurate, without sacrificing the key properties that make MM-FFs so successful.

Details

ISSN :
10897690
Volume :
153
Issue :
12
Database :
OpenAIRE
Journal :
The Journal of chemical physics
Accession number :
edsair.doi.dedup.....e76cfb14c1ea7eb27d98821242052770