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arXiv 1902.05115physics.chem-ph
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最少开关表面跳跃算法在磁场中复哈密顿量和量子物理学中的推广:Berry相位和“磁”力

An extension of the fewest switches surface hopping algorithm to complex Hamiltonians and photophysics in magnetic fields: Berry's phase and "magnetic" forces

Gaohan Miao, Nicole Bellonzi, Joseph Subotnik

摘要:

我们提出了一个初步的扩展的最少开关表面跳跃(FSSH)算法的情况下,复杂的哈密顿适合模拟光激发分子在磁场的动力学。我们使ansatze的动量重新标度的方向,我们占贝里的相位效应,通过“磁”力适用于在绝热极限。由于Berry的相位是一组纠缠势能面的非局域拓扑特征,我们发现Tully的局部FSSH算法只能部分捕获正确的物理。

英文摘要:

We present a preliminary extension of the fewest switches surface hopping (FSSH) algorithm to the case of complex Hamiltonians as appropriate for modeling the dynamics of photoexcited molecules in magnetic fields. We make ansatze for the direction of momentum rescaling and we account for Berry's phase effects through "magnetic" forces as applicable in the adiabatic limit. Because Berry's phase is a nonlocal, topological characteristic of a set of entangled potential energy surfaces, we find that Tully's local FSSH algorithm can only partially capture the correct physics.

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