实体和复杂响应函数的高效并行实现,采用二次代数-图形构造方案用于极化扩散器
Manuel Brand1, Andreas Dreuw2, Patrick Norman1
1Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm SE-100 44, Sweden.
这项研究引入了一种有效的计算方法来分析分子性质. 这种新方法可以准确计算复杂系统的紫外线/紫外线光谱和电子圆形二元化.
科学领域:
- 量子化学 是一个量子化学.
- 计算物理 计算物理
- 频谱学是一种光谱学.
背景情况:
- 精确计算分子性质对于理解化学和物理过程至关重要.
- 需要先进的理论方法来建模复杂的系统及其光谱反应.
- 代数图形构造 (ADC) 方法提供了一种系统的方式来计算电子属性.
研究的目的:
- 实现一个高效的矩阵折叠形式主义来计算复杂的响应函数.
- 使用二次代数图形构造 (ADC(2) 方案计算过渡属性.
- 证明该方法对UV/vis光谱和电子循环二元化 (ECD) 的适用性.
主要方法:
- 开发一种高效的矩阵折叠形式主义.
- 实现混合MPI/OpenMP并行化用于大规模计算.
- 在响应方程中应用频率分离处理.
- 使用复杂的极化传播器方法.
主要成果:
- 成功计算了高达1032基函数的关氨酸寡合物的紫外线/紫外线光谱.
- 演示高效的扩展,使用多达32,768个CPU核心.
- 对大光谱窗口的频率分离方法的验证.
- 首次报告的ECD频谱是使用复杂的极化传播器在ADC(2) 级计算的.
结论:
- 矩阵折叠形式主义为电子结构计算提供了一种高效和可扩展的方法.
- 开发的方法准确地预测了光谱特性,包括UV/vis和ECD.
- 这项工作提升了量子化学中研究复杂分子系统的计算能力.
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