磁场中的非adiabatic合矩阵元素:几何尺度依赖性和贝里相
Tanner Culpitt1, Erik I Tellgren2, Laurens D M Peters2
1Theoretical Chemistry Institute and Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave., Madison, Wisconsin 53706, USA.
The Journal of chemical physics
|November 12, 2024
概括
我们开发了一种新方法来计算复杂值波函数的非adiabatic合矩阵元素 (NACMEs),这对于分子动力学至关重要. 这种方法还使量子化学中的贝里曲率和相位的计算成为可能.
科学领域:
- 量子化学 是一个量子化学.
- 理论化学 理论化学
- 计算化学计算化学
背景情况:
- 非adiabatic合矩阵元件 (NACMEs) 对于分子动力学模拟,特别是表面跳跃方法至关重要.
- NACMEs表现出测量尺度依赖性,使复杂值波函数的计算复杂化,这些波函数来自磁场或自旋轨道合.
- 果曲率和果力在磁场影响的分子动力学和旋转轨道合环境中具有重要意义.
研究的目的:
- 开发一个可靠的方案来计算连续的,可微分的NACME复杂值波函数作为分子几何学的函数.
- 通过使用高层理论首次计算基态和兴奋状态贝里曲率.
- 从对角 NACME 直接计算贝里相.
主要方法:
- 开发一种用于测距不变NACME计算的新型计算方案.
- 应用完整配置交互 (FCI) 理论水平,以获得高精度.
- 使用H2分子作为测试案例的演示.
主要成果:
- 成功计算复杂值波函数的连续和可微分NACME.
- 首次计算FCI级别的地面和兴奋状态贝里曲线.
- 从对角 NACME 来直接计算贝里相.
结论:
- 开发的方法为复杂系统计算NACME,Berry曲率和Berry相提供了一种可靠的方法.
- 这项工作提升了涉及非adiabatic效应的分子动力学模拟的准确性和适用性.
- 这些发现特别适用于具有磁场或显著自旋轨道合的系统.
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