Chemtrain: Learning Deep Potential Models Via Automatic Differentiation and Statistical Physics

作     者：Fuchs, Paul Thaler, Stephan Röcken, Sebastien Zavadlav, Julija 

作者机构：Department of Engineering Physics and Computation TUM School of Engineering and Design Technical University of Munich Germany Valence Labs MontrealQC Canada Atomistic Modeling Center Munich Data Science Institute Technical University of Munich Germany 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Coarse grained modeling 

摘      要：Neural Networks (NNs) are promising models for refining the accuracy of molecular dynamics, potentially opening up new fields of application. Typically trained bottom-up, atomistic NN potential models can reach first-principle accuracy, while coarse-grained implicit solvent NN potentials surpass classical continuum solvent models. However, overcoming the limitations of costly generation of accurate reference data and data inefficiency of common bottom-up training demands efficient incorporation of data from many sources. This paper introduces the framework chemtrain to learn sophisticated NN potential models through customizable training routines and advanced training algorithms. These routines can combine multiple top-down and bottom-up algorithms, e.g., to incorporate both experimental and simulation data or pre-train potentials with less costly algorithms. chemtrain provides an object-oriented high-level interface to simplify the creation of custom routines. On the lower level, chemtrain relies on JAX to compute gradients and scale the computations to use available resources. We demonstrate the simplicity and importance of combining multiple algorithms in the examples of parametrizing an all-atomistic model of titanium and a coarse-grained implicit solvent model of alanine dipeptide. © 2024, The Authors. All rights reserved.