预测的波函数外推方案加速平面波混合功能基础的波恩-奥本海默分子动力学模拟
Shizhe Jiao1, Lingyun Wan1, Jielan Li1
1Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of the Ministry of Education for Mathematical Foundations and Applications of Digital Technology, Anhui Center for Applied Mathematics, University of Science and Technology of China, Hefei, Anhui 230026, China.
The journal of physical chemistry. A
|January 31, 2025
概括
一种新的预测总是稳定的预测-校正 (PASPC) 方法加速了基于混合功能的Born-Oppenheimer分子动力学 (H-BOMD) 模拟. 这种方法降低了计算成本,并提高了分子和固体系统的精度.
科学领域:
- 计算化学和物理计算化学和物理
- 材料科学 材料科学 材料科学
- 量子力学就是量子力学.
背景情况:
- 波恩-奥本海默分子动力学 (BOMD) 模拟对于理解分子和固体系统动力学至关重要.
- 基于混合函数的BOMD (H-BOMD) 模拟,特别是与平面波基集的模拟,由于频繁的自一致场 (SCF) 计算,因此在计算上昂贵.
- 加快这些模拟对于更广泛的适用性和效率至关重要.
研究的目的:
- 开发一种高效的波函数外推方法,以加速平面波H-BOMD模拟.
- 为了减少每个分子动力学 (MD) 步骤所需的SCF代的数量.
- 为了保持或提高BOMD模拟的准确性.
主要方法:
- 介绍预测总是稳定的预测-校正器 (PASPC) 方法用于波函数外推.
- 对分子和固体系统的不同抽象方案的收性质的研究.
- 在平面波H-BOMD中使用PASPC对能量漂移和模拟精度的评估.
主要成果:
- 通过减少SCF代,PASPC显著加快了平面波H-BOMD模拟.
- 这种方法使波函数更接近真解空间,从而增强了收.
- 通过PASPC,可以减少能量漂移的振荡,从而实现更大的时间步骤,特别是在重原子系统中.
- 模拟显示二氧化和液态水的功率和红外光谱的精度提高,与实验数据相比.
结论:
- 在不影响精度的情况下,PASPC方法为平面波H-BOMD模拟提供了相当大的加速度.
- PASPC提高了复杂分子和固体系统的BOMD模拟的可靠性和效率.
- 这一进步有助于更准确地预测材料属性和动态行为.
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