On-the-fly ab initio molecular dynamics with multiconfigurational Ehrenfest method.

On-the-fly ab initio molecular dynamics with multiconfigurational Ehrenfest method.
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DOI:
10.1063/1.4734313
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发表时间:
2012-07
期刊:
The Journal of chemical physics
影响因子:
--
通讯作者:
Kenichiro Saita;D. Shalashilin
Kenichiro Saita;D. Shalashilin
中科院分区:
其他
文献类型:
--
作者:
Kenichiro Saita;D. Shalashilin

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在本文中,我们报告了用于模拟超快非绝热动力学的从头开始多构型 Ehrenfest (AI-MCE) 方法的形式主义和首次实现,该方法使用 MOLPRO 电子结构程序动态计算势能面。该方法在乙烯激发 ππ* 态动力学的基准上进行了测试,产生的动力学与之前通过从头算多重产卵技术进行的模拟一致。 AI-MCE 看起来健壮、稳定且高效。
In this article we report the formalism and first implementation of the ab initio multiconfigurational Ehrenfest (AI-MCE) method for simulation of ultrafast nonadiabatic dynamics, which uses the MOLPRO electronic structure program to calculate the potential energy surfaces on the fly. The approach is tested on the benchmark of the excited ππ∗ state dynamics of ethylene producing the dynamics which agree with previous simulations by ab initio multiple spawning technique. The AI-MCE seems to be robust, stable and efficient.