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Calculation of Transition State Energies in the HCN-HNC Isomerization with an Algebraic Model

机译:用代数模型计算HCN-HNC异构化的过渡状态能量

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Recent works have shown that the spectroscopic access to highly excited states provides enough information to characterize transition states in isomerization reactions. Here, we show that information about the transition state of the bond-breaking HCN-HNC isomerization reaction can also be achieved with the two-dimensional limit of the algebraic vibron model. We describe the system's bending vibration with the algebraic Hamiltonian and use its classical limit to characterize the transition state. Using either the coherent state formalism or a recently proposed approach by Baraban et al. [Science 2015, 350, 1338-1342], we obtain an accurate description of the isomerization transition state. In addition, we show that the energy-level dynamics and the transition state wave function structure indicate that the spectrum in the vicinity of the isomerization saddle point can be understood in terms of the formalism for excited-state quantum phase transitions.
机译:最近的作用表明,对高兴奋状态的光谱通量提供足够的信息来表征异构化反应中的过渡状态。 这里,我们表明还可以通过代数Vibron模型的二维极限来实现关于破坏HCN-HNC异构化反应的过渡状态的信息。 我们用代数Hamiltonian描述了系统的弯曲振动,并使用其经典极限来表征过渡状态。 使用长期状态形式主义或Baraban等人的最近提出的方法。 [2015,350,1350,1338-1342],我们获得了异构化过渡状态的准确描述。 另外,我们表明能量级动力学和转变状态波函数结构表明,可以以兴奋状态量相转变的形式主义来理解异构化鞍点附近的光谱。

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