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通过引入辅助波包到轨道分支的轨迹,具有可靠的波函数的表面跳跃.
Xin Guo1, Guijie Li1, Zhecun Shi1
1Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310058, China.
新的辅助分支校正表面跳跃 (A-BCSH) 方法解决了非adiabatic动态模拟中的过度连贯问题. 它准确地捕捉了非连贯性,并使用波函数提供了可靠的密度矩阵计算.
科学领域:
- 量子化学 是一个量子化学.
- 计算化学计算化学
- 化学动力学 化学动力学
背景情况:
- 最少的开关表面跳跃 (FSSH) 方法存在过度连贯性,限制了非adiabatic动态的准确性.
- 来自波函数的阿迪亚巴特种群往往不如来自活性状态的种群那么可靠.
- 一个完整的描述nonadiabatic动态需要使用密度矩阵.
研究的目的:
- 引入一种新的辅助分支纠正表面跳跃 (A-BCSH) 方法.
- 解决表面跳跃模拟中的过度连贯性问题.
- 允许可靠的密度矩阵计算从波函数在nonadiabatic动态.
主要方法:
- 开发了A-BCSH方法,将辅助波包 (WPs) 结合在电位能量表面上,用于轨迹分支.
- 标志着WP组件的快速和渐进的分离,以捕获准确的脱时间.
- 使用三个标准的塔利模型验证了该方法.
主要成果:
- A-BCSH表现出良好的内部一致性,从波函数和活性状态中产生可比的亚亚巴特群.
- 该方法成功地捕获了密度矩阵的可靠的时间依赖空间分布.
- 在每个轨道上实现了准确的脱凝时间计算.
结论:
- 通过减轻过度连贯性,A-BCSH提供了与传统FSSH方法相比显著的改进.
- 该方法为开发更一致的表面跳跃技术提供了一个有希望的新视角.
- 允许对非adiabatic动态的密度矩阵基于波函数的可靠计算.
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