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Quantum Mechanical Investigation of Mode-Specific Tunneling upon Fundamental Excitation in Malonaldehyde

机译:丙二醛基础激发下特定模式隧穿的量子力学研究

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摘要

We present a quantum mechanical study of mode-specific tunneling upon fundamental excitation in malonaldehyde with a multidimensional theory that utilizes the saddle-point normal coordinates. We find that a ring-deformation normal mode is as essential as the well-known imaginary-frequency normal mode in the multidimensional investigation. The changes in tunneling splittings upon fundamental excitation are calculated. The results are competitive with those from a recently developed mixed classical-quantum method. Moreover, the results are qualitatively consistent with experiment for about half of all the modes.
机译:我们通过利用鞍点法向坐标的多维理论,对丙二醛中基本激发下的模式特定隧穿进行了量子力学研究。我们发现,在多维研究中,环形变形法线模与众所周知的虚频法线模一样重要。计算了基本激励下隧道裂隙的变化。该结果与最近开发的混合经典量子方法的结果具有竞争力。而且,对于所有模式的大约一半,结果在质量上与实验一致。

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