Abstract
We present a review of rigorous mathematical results about non-adiabatic transitions in molecular systems that are associated with avoided crossings of electron energy level surfaces. We then present a novel numerical technique for studying these transitions that is based on expansions in semiclassical wavepackets.
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Bourquin, R., Gradinaru, V. & Hagedorn, G.A. Non-adiabatic transitions near avoided crossings: theory and numerics. J Math Chem 50, 602–619 (2012). https://doi.org/10.1007/s10910-011-9827-2
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DOI: https://doi.org/10.1007/s10910-011-9827-2