A transition-rate investigation by molecular dynamics with the Langevin/implicit-Euler scheme
A transition-rate investigation by molecular dynamics with the Langevin/implicit-Euler scheme
复制标题
使用朗之万/隐式欧拉方案通过分子动力学研究跃迁率
DOI:
10.1063/1.461715
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发表时间:
1991
影响因子:
4.4
通讯作者:
T. Schlick
中科院分区:
文献类型:
--
作者:
A. Nyberg;T. Schlick
We report results from molecular dynamics simulations for a bistable piecewise‐harmonic potential. A new method for molecular dynamics—the Langevin/implicit‐Euler scheme—is investigated here and compared to the common Verlet integration algorithm. The implicit scheme introduces new computational and physical features since it (1) does not restrict integration time step to a very small value, and (2) effectively damps vibrational modes ω≫ωc, where ωc is a chosen cutoff frequency. The main issue we explore in this study is how different choices of time steps and cutoff frequencies affect computed transition rates. The one‐dimensional, double‐well model offers a simple visual and computational opportunity for observing the two different damping forces introduced by the scheme—frictional and intrinsic—and for characterizing the dominating force at a given parameter combination. Another question we examine here is the choice of time step below which the Langevin/implicit‐Euler scheme produces ‘‘correct’’ trans...
影响因子:
5.6
作者:
Schlick,T;Olson,WK
通讯作者:
Olson,WK