Ab initio molecular dynamics accurately describing weak interactions
Ab initio molecular dynamics accurately describing weak interactions
批准号:
21750025
负责人:
SATO Takeshi
金额:
$1.83万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Young Scientists (B)
财政年份:
2009
资助国家:
日本
项目状态:
已结题
起止时间:
2009 至 2010
中文摘要
密度泛函理论(DFT)不能描述色散相互作用。经验色散校正对于较新的系统是不可靠的。本文提出了一种基于局部响应近似(LRD)计算色散相互作用的新方法。我们的目标是一种以低计算成本准确描述弱相互作用的方法。LRD方法给出了分子中原子间色散系数作为基态电子密度的函数。对多中心相互作用的推广和自洽场的实现使复杂分子组装的精确量子化学计算成为可能。
英文摘要
Density functional theory (DFT) cannot describe the dispersion interaction. Empirical dispersion corrections are unreliable for newer systems. In this work, we propose a new method to compute the dispersion interaction based on the local response approximation (LRD). Our goal is a method that accurately describes weak interactions with a low computational cost. The LRD method gives dispersion coefficients between atoms in a molecule as a functional of the ground-state electron density. A generalization to the multicenter interactions and the self-consistent field implementation enable accurate quantum chemical calculations of complex molecular assemblies.
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