在长时间尺度上评估非adiabatic动力学方法.
Saikat Mukherjee1,2, Yorick Lassmann3, Rafael S Mattos2
1Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, Toruń 87100, Poland.
Journal of chemical theory and computation
|December 16, 2024
概括
非adiabatic动力学模拟揭示了兴奋状态机制. 基于轨迹的方法,如FSSH和AIMS,尽管计算成本很高,但对长时间的光化学过程模拟有希望.
科学领域:
- 化学物理 化学物理
- 计算化学计算化学
- 摄影化学的使用.
背景情况:
- 非相应动力学模拟对于理解光化学反应中的超快激发状态机制至关重要.
- 应用范围涵盖能源,材料和药物研究,但高计算成本限制模拟到皮秒.
- 较长的时间尺度对于捕捉许多光激活过程至关重要.
研究的目的:
- 评估用于长时间模拟的流行的非adiabatic动力学方法的性能.
- 为了比较多重配置时间依赖的哈特树 (MCTDH),多层MCTDH (ML-MCTDH),初始多重产卵 (AIMS) 和最少开关的表面跳跃 (FSSH).
- 为了评估模拟准确性,一个多维的自旋玻色子模型展现长时间尺度衰变.
主要方法:
- 使用的MCTDH,ML-MCTDH,AIMS和FSSH方法.
- 模拟了一个弱合的多维自旋玻色子模型的兴奋状态动态.
- 专注于一个设计用于长时间衰变行为的模型.
主要成果:
- 所有测试方法 (MCTDH,ML-MCTDH,AIMS,FSSH) 的结果在质量上都相似.
- 尽管存在理论上的差异,但模拟结果是可比的.
- 基于轨迹的方法证明了扩展时间尺度动态的可行性.
结论:
- 基于轨迹的方法可用于模拟长时间尺度的非adiabatic动态.
- 这些方法为研究更慢的光化学过程提供了前进的途径.
- 量子动力学模拟在延长的时间尺度上仍然是计算上不可行的.
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