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arXiv 2602.11071cond-mat.mtrl-sci
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原子级机器学习中的长程静电学:一种物理视角

Long-range electrostatics in atomistic machine learning: a physical perspective

Università degli Studi di Modena e Reggio Emilia(摩德纳与雷焦艾米利亚大学);CNR-NANO S3(意大利国家研究委员会纳米研究所S3);Delft University of Technology(代尔夫特理工大学);Climate Safety and Security Centre, TU Delft The Hague Campus(代尔夫特理工大学海牙校区气候安全与中心);Scuola Internazionale Superiore di Studi Avanzati (SISSA)(高等国际研究学院);Sorbonne Université(索邦大学);CNRS(法国国家科学研究中心)

Federico Grasselli, Kevin Rossi, Stefano de Gironcoli, Andrea Grisafi

AI总结:

本文从物理角度探讨了原子级机器学习中长程静电学的整合方法,区分了局部与非局部模型,并讨论了其在电化学界面和离子传输中的应用与影响。

摘要:

在原子级机器学习(ML)中纳入长程静电学正受到越来越多的关注,以实现对广泛分子和材料性质的量子力学准确预测。然而,仍然没有通用的指导方针,说明如何在保持大多数可转移ML表示所依赖的已确立的局部性原则的同时,将长程物理效应纳入模型中。在这里,我们从物理的角度探讨该问题,通过讨论如何通过采用不同的学习范式来捕捉系统静电学的不同贡献。具体而言,我们区分了依赖于显式电荷密度分解或隐式辅助变量的局部电荷模型,以及故意引入非局部性概念的模型,无论是通过自洽程序还是使用非局部描述符和学习架构。我们进一步处理了通过与系统的极化耦合来纳入有限电场效应的相关方面,这对于应用外部电势偏置是相关的。最后,我们讨论了对电化学界面模拟的影响,其中长程静电学对于捕捉电荷再分布、界面动力学和离子屏蔽之间的相互作用至关重要,并且对于离子传输现象,尽管研究较少,但其包含似乎远不敏感。

英文摘要:

The inclusion of long-range electrostatics in atomistic machine learning (ML) is receiving increasing attention for achieving quantum-mechanical accuracy in predicting a wide range of molecular and material properties. However, there is still no general prescription for how long-range physical effects should be incorporated into a model while preserving the well-established locality principles underlying most transferable ML representations. Here, we provide a physical perspective on this problem by discussing how distinct contributions to a system's electrostatics can be captured through different learning paradigms. Specifically, we distinguish between local charge models, which rely either on explicit charge-density decompositions or implicit auxiliary variables, and models in which a notion of nonlocality is deliberately introduced, either via self-consistent procedures or by using nonlocal descriptors and learning architectures. We further address the related aspect of incorporating finite-field effects through coupling to the system's polarization, relevant for applications involving an external electric bias. We conclude by discussing implications for simulations of electrochemical interfaces, where long-range electrostatics are essential to capture the interplay between charge redistribution, interfacial dynamics, and ionic screening, as well as for ionic transport phenomena, which, although less explored, appear far less sensitive to their inclusion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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