Geometric analysis of anharmonic downward distortion following paths

Geometric analysis of anharmonic downward distortion following paths
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非谐波向下失真跟随路径的几何分析

DOI:
10.1002/jcc.26430
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发表时间:
2020
影响因子:
3
通讯作者:
Taketsugu Tetsuya
Taketsugu Tetsuya
中科院分区:
化学3区
文献类型:
--
作者:
Ebisawa Shuichi;Tsutsumi Takuro;Taketsugu Tetsuya

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讨论了非谐波向下失真跟随 (ADDF) 路径的数学方面。 ADDF方法被用作自动反应路径搜索方法,它可以从势极小值开始探索势能面上的过渡态几何形状。我们证明与潜在最小值相交的ADD静止路径的最大数量是2f+ 1− 2,其中f表示系统的自由度。我们还表明,ADD 平稳路径的分叉对于检测从给定最小值连接的所有过渡态至关重要。针对观察到干草叉分叉的 H2O 分子演示了 ADDF 计算。
A mathematical aspect of the anharmonic downward distortion following (ADDF) path is discussed. The ADDF method is utilized as an automated reaction path search method, which can explore transition state geometries on a potential energy surface from a potential minimum. We show that the maximum number of the ADD stationary paths intersecting the potential minimum is 2f+ 1− 2, wherefdenotes the degree of freedom of the system. We also show that the bifurcation of the ADD stationary path is essential to detect all the transition states connected from a given minimum. The ADDF computation is demonstrated for a H2O molecule in which pitchfork bifurcation is observed.
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