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arXiv 2607.03433cond-mat.mtrl-sciphysics.chem-ph
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Dyna-Mat:有限温度系综中基础机器学习原子间势的端到端基准测试

Dyna-Mat: End-to-end benchmarking of foundation machine learning interatomic potentials in finite-temperature ensembles

University College London(伦敦大学学院);Utrecht University(乌得勒支大学);National Center for Nuclear Research(国家核研究中心);Periodic Labs(周期实验室);Fritz-Haber-Institut der Max-Planck-Gesellschaft(马克斯·普朗克学会弗里茨·哈伯研究所);Aristotle University of Thessaloniki(塞萨洛尼基亚里士多德大学);Ruđer Boškovi’c Institute(鲁杰尔·博什科维奇研究所);University of Iceland(冰岛大学)
Mikołaj J. Gawkowski, Nongnuch Artrith, Silvia Bonfanti, Abhijeet Sadashiv Gangan, Hendrik H. Heenen, Joseph Kioseoglou, Ivor Lončarić, Hemanadhan Myneni, Janos… 展开作者

Mikołaj J. Gawkowski, Nongnuch Artrith, Silvia Bonfanti, Abhijeet Sadashiv Gangan, Hendrik H. Heenen, Joseph Kioseoglou, Ivor Lončarić, Hemanadhan Myneni, Janosh Riebesell, Mariana Rossi, Matthias Rupp, Jonathan Schmidt, Shubham Sharma, Benjamin X. Shi, Antoni Wadowski, Lukas Hörmann, Venkat Kapil

AI总结:

介绍用于测试基础机器学习原子间势的Dyna-Mat-v1.0数据集,通过比较能量和力误差评估15个基础MLIPs,发现力误差与结构动力学可观测量误差关系,构建帕累托前沿评估模型,强调端到端有限温度验证的重要性。

摘要:

基础机器学习原子间势(MLIPs)越来越多地被用作第一性原理计算的直接替代品,能够在以前无法达到的长度和时间尺度上模拟材料。然而,由于缺乏地面真值数据,它们在有限热力学系综中对结构和动力学可观测量的准确性尚未确定。在这里,我们引入了Dyna-Mat-v1.0,这是一个凝聚相第一性原理分子动力学轨迹的基准数据集,旨在在现实的有限温度条件下测试基础MLIPs。使用这个数据集,我们通过比较第一性原理构型上的单点能量和力误差以及由MLIP驱动的轨迹生成的可观测量,对四个模型层级的15个基础MLIPs进行了评估。我们发现,“平均而言”,单点力误差较低的模型在结构和动力学可观测量上也产生较低的误差。然而,对于个别系统,低力误差会导致预测结构的定性失败。在大多数模型中,压力仍然描述得很差,这表明当前大规模训练数据集中可用的密度泛函理论应力标签存在局限性。最后,我们构建了一个准确性-成本帕累托前沿,以确定使用基础MLIPs进行分子动力学的最佳权衡,发现根据这里考虑的准确性指标,最新一代的交叉训练模型接近帕累托最优。总体而言,Dyna-Mat-v1.0表明,端到端有限温度验证对于量化基础MLIPs的预测行为至关重要,并为评估它们提供了一条简单、可扩展的途径,超越了与材料设计相关的静态和谐波基准。

英文摘要:

Foundation machine learning interatomic potentials (MLIPs) are increasingly being used as drop-in replacements for first-principles calculations, enabling simulations of materials at length and time scales that were previously inaccessible. However, due to lack of ground truth data, their accuracy on structural and dynamical observables in finite thermodynamic ensembles is yet to be established. Here, we introduce Dyna-Mat-v1.0, a benchmark dataset of condensed-phase first-principles molecular dynamics trajectories designed to test foundation MLIPs at realistic finite-temperature conditions. Using this dataset, we evaluate 15 foundation MLIPs across four model tiers by comparing both single-point energy and force errors on first-principles configurations and observables generated from MLIP-driven trajectories. We find that "on average" models with lower single-point force errors also yield lower errors for structural and dynamical observables. However, there are individual systems for which low force errors lead to qualitative failures in the predicted structure. Pressure remains poorly described across most models, pointing to limitations in the density functional theory stress labels available in current large-scale training datasets. Finally, we construct an accuracy-cost Pareto frontier to identify the best trade-offs for molecular dynamics with foundation MLIPs, finding that the latest generation of cross-trained models is close to Pareto-optimal according to the accuracy metrics considered here. Overall, Dyna-Mat-v1.0 shows that end-to-end finite-temperature validation is essential for quantifying the predictive behaviour of foundation MLIPs, and provides a simple, scalable route for assessing them beyond static and harmonic benchmarks relevant to materials design.

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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