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Author Spotlight: A Novel Cell Injection Method with Minimum Invasion

Author Spotlight: A Novel Cell Injection Method with Minimum Invasion

Published on: April 21, 2023

A preconditioning scheme for minimum energy path finding methods.

Stela Makri¹, Christoph Ortner², James R Kermode¹

¹Warwick Centre for Predictive Modelling, School of Engineering, University of Warwick, CV4 7AL Coventry, United Kingdom.

The Journal of Chemical Physics

|March 10, 2019

Summary

This summary is machine-generated.

We present a new method to speed up calculations of transition paths in molecular simulations. By incorporating potential energy curvature, our approach significantly reduces computational costs for finding minimum energy paths.

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Area of Science:

Computational chemistry
Materials science
Molecular dynamics

Background:

Standard transition path finding methods like nudged elastic band and string methods often neglect potential energy curvature.
This omission leads to inefficient convergence to the minimum energy path, especially on complex potential energy surfaces.

Purpose of the Study:

To develop a more computationally efficient approach for identifying transition paths in molecular simulations.
To reduce the computational cost associated with transition path finding algorithms.

Main Methods:

A novel preconditioning scheme is introduced.
An adaptive time step selection algorithm is combined with the preconditioning scheme.
The approach is tested on vacancy and dislocation migration models.

Main Results:

The proposed method substantially reduces the computational cost of transition path finding.
Improved performance is demonstrated across various examples.
The method is effective for models using both interatomic potentials and density functional theory.

Conclusions:

The new preconditioning scheme and adaptive time step selection offer a significant computational advantage for transition path finding.
This approach enhances the efficiency of molecular simulations for studying processes like vacancy and dislocation migration.