Linear Scaling Calculation of Atomic Forces and Energies with Machine Learning Local Density Matrix
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912176305864704 |
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| author | Xin, Zaizhou Zhong, Yang Gong, Xingao Xiang, Hongjun |
| author_facet | Xin, Zaizhou Zhong, Yang Gong, Xingao Xiang, Hongjun |
| contents | Accurately calculating energies and atomic forces with linear-scaling methods is a crucial approach to accelerating and improving molecular dynamics simulations. In this paper, we introduce HamGNN-DM, a machine learning model designed to predict atomic forces and energies using local density matrices in molecular dynamics simulations. This approach achieves efficient predictions with a time complexity of O(n), making it highly suitable for large-scale systems. Experiments in different systems demonstrate that HamGNN-DM achieves DFT-level precision in predicting the atomic forces in different system sizes, which is vital for the molecular dynamics. Furthermore, this method provides valuable electronic structure information throughout the dynamics and exhibits robust performance. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_01863 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Linear Scaling Calculation of Atomic Forces and Energies with Machine Learning Local Density Matrix Xin, Zaizhou Zhong, Yang Gong, Xingao Xiang, Hongjun Materials Science Chemical Physics Computational Physics Accurately calculating energies and atomic forces with linear-scaling methods is a crucial approach to accelerating and improving molecular dynamics simulations. In this paper, we introduce HamGNN-DM, a machine learning model designed to predict atomic forces and energies using local density matrices in molecular dynamics simulations. This approach achieves efficient predictions with a time complexity of O(n), making it highly suitable for large-scale systems. Experiments in different systems demonstrate that HamGNN-DM achieves DFT-level precision in predicting the atomic forces in different system sizes, which is vital for the molecular dynamics. Furthermore, this method provides valuable electronic structure information throughout the dynamics and exhibits robust performance. |
| title | Linear Scaling Calculation of Atomic Forces and Energies with Machine Learning Local Density Matrix |
| topic | Materials Science Chemical Physics Computational Physics |
| url | https://arxiv.org/abs/2501.01863 |