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arXiv 2402.07299physics.chem-ph
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经典代价下的量子品质:利用面跳跃映射方法进行从头算非绝热动力学模拟

Quantum Quality with Classical Cost: Ab Initio Nonadiabatic Dynamics Simulations using the Mapping Approach to Surface Hopping

Jonathan R. Mannouch, Aaron Kelly

AI总结:

本文证明基于轨迹的非绝热动力学方法MASH可与从头算电子结构高效结合,以远低于波包方法的计算成本获得更精确的结果。

摘要:

非绝热动力学方法是研究光化学过程的重要工具。在采用第一性原理电子结构技术的背景下,此类模拟可以通过基于半经典轨迹的方法或波包方法以实用的方式进行。虽然所有适用于第一性原理模拟的方法都必然是近似的,但人们通常认为波包方法在精度上比半经典方法具有固有优势,而这种优势只是以更高的计算成本为代价。在此,我们证明面跳跃映射方法(MASH)——一种最近提出的基于轨迹的非绝热动力学方法——可以高效地与从头算电子结构协同应用。我们的结果甚至表明,MASH可能比实时波包技术提供更精确的结果,而计算成本却低得多。

英文摘要:

Nonadiabatic dynamics methods are an essential tool for investigating photochemical processes. In the context of employing first principles electronic structure techniques, such simulations can be carried out in a practical manner using semiclassical trajectory-based methods or wave packet approaches. While all approaches applicable to first principles simulations are necessarily approximate, it is commonly thought that wave packet approaches offer inherent advantages over their semiclassical counterparts in terms of accuracy, and that this trait simply comes at a higher computational cost. Here we demonstrate that the mapping approach to surface hopping (MASH), a recently introduced trajectory-based nonadiabatic dynamics method, can be efficiently applied in tandem with ab initio electronic structure. Our results even suggest that MASH may provide more accurate results than on-the-fly wave packet techniques, all at a much lower computational cost.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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