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首页> 外文期刊>Chemical Physics Letters >Time-dependent density-functional theory method in the electron nuclear dynamics framework
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Time-dependent density-functional theory method in the electron nuclear dynamics framework

机译:电子核动力学框架中的时变密度泛函理论方法

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摘要

A time-dependent density-functional theory (DFT) dynamics method in the electron nuclear dynamics (END) framework is presented. This time-dependent variational method treats simultaneously the nuclei and electrons of a system without utilizing predetermined potential energy surfaces. Like the simplest-level END, this method adopts a classical-mechanics description for the nuclei and a Thouless single-determinantal representation for the electrons. However, the electronic description is now expressed in a Kohn-Sham DFT form that provides electron correlation effects absent in the simplest-level END. Current implementation of this method employs the adiabatic approximation in the exchange-correlation action and potential. Simulations of molecular vibrations and proton-molecule reactions attest to the accuracy of the present method.
机译:提出了一种在电子核动力学(END)框架下的时变密度泛函理论(DFT)动力学方法。这种与时间有关的变分方法可以同时处理系统的原子核和电子,而无需利用预定的势能面。像最简单的END一样,该方法对原子核采用经典力学描述,对电子采用Thouless单行列式表示。但是,电子描述现在以Kohn-Sham DFT形式表示,该形式提供了最简单的END中不存在的电子相关效应。该方法的当前实现方式在交换相关作用和势能中采用了绝热近似。分子振动和质子-分子反应的模拟证明了本方法的准确性。

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