arXiv:2601.12630physics.chem-phcond-mat.mtrl-sci2026-01被引 2

融合两种方法,更快准找到化学反应关键过渡态。

Enhanced Climbing Image Nudged Elastic Band method with Hessian Eigenmode Alignment

  • 结合CI-NEB与MMF,动态调整路径搜索策略。
  • 在双测试集上减少57%和31%的计算量。
  • 适合需要快速筛选反应路径的研究者。

准确确定过渡态对理解反应动力学至关重要。双端点方法如爬升图像无摩擦弹性带法(CI-NEB)需指定初末态,可识别两点间的最低能量路径及对应的势能面上鞍点,从而在过渡态理论的谐振近似下估计过渡态,但计算成本高,且在极度平坦或崎岖的势能面上易停滞。而仅需初始原子坐标的方法如最小模态跟踪法(MMF)效率高,但可能收敛至无关的鞍点。本文提出一种自适应混合算法,将CI-NEB与MMF结合,实现更快收敛至相关鞍点。该方法在Baker-Chan(BC)鞍点测试集上使用PET-MAD机器学习势能进行基准测试,并在OptBench基准集中验证了59个七聚体岛在Pt(111)表面的反应过渡。贝叶斯分析显示,相对于CI-NEB,BC集的能量与力计算量减少57% [95%可信区间:-64%,-50%],七聚体岛过渡平均减少31%。结果表明该混合方法是高通量自动化发现原子重排路径的高效工具。

原文摘要 · Abstract (English)

Accurate determination of transition states is central to an understanding of reaction kinetics. Double-endpoint methods where both initial and final states are specified, such as the climbing image nudged elastic band (CI-NEB), identify the minimum energy path between the two and thereby the saddle point on the energy surface that is relevant for the given transition, thus providing an estimate of the transition state within the harmonic approximation of transition state theory. Such calculations can, however, incur high computational costs and may suffer stagnation on exceptionally flat or rough energy surfaces. Conversely, methods that only require specification of an initial set of atomic coordinates, such as the minimum mode following (MMF) method, offer efficiency but can converge on saddle points that are not relevant for transition of interest. Here, we present an adaptive hybrid algorithm that integrates the CI-NEB with the MMF method so as to get faster convergence to the relevant saddle point. The method is benchmarked for the Baker-Chan (BC) saddle point test set using the PET-MAD machine-learned potential as well as 59 transitions of a heptamer island on Pt(111) from the OptBench benchmark set. A Bayesian analysis of the performance shows a reduction in energy and force calculations of 57% [95% CrI: -64%, -50%] relative to CI-NEB for the BC set, while a 31% mean reduction is found for the transitions of the heptamer island. These results establish this hybrid method as a highly effective tool for high-throughput automated chemical discovery of atomic rearrangements.

过渡态机器学习反应路径优化算法

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