Modal optimisation within the time-independent eigenstate-free Raman wavefunction formalism

Modal optimisation within the time-independent eigenstate-free Raman wavefunction formalism
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时间无关的无本征态拉曼波函数形式内的模态优化

DOI:
10.1080/00268976.2019.1643047
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发表时间:
--
期刊:
影响因子:
1.7
通讯作者:
G. Rauhut
G. Rauhut
中科院分区:
化学4区
文献类型:
--
作者:
T. Petrenko;G. Rauhut

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与时间无关的无本征态拉曼波函数方法是基于振动非均匀薛定谔方程(伊势)的,它是一种很有前途的方法,可以替代著名的态求和方法和与时间相关的方法来计算光学带形和共振拉曼强度。伊势的解,即拉曼波函数(RWF),可以在振动组态相互作用(VCI)模型中得到。在这种方法中,振动模态的优化可以提供一个更好的收敛的计算RWF向完整的VCI限制。为此目的,伊势问题的变分原理制定。模态函数的变分条件导致复杂的非均匀振动自洽场方程。讨论了实施这一方法的关键方面。该方法的性能与传统的计划相比,涉及不同质量的VCI基地的说明为呋喃中的AA过渡。由于模态优化的定量效果被发现是相对较小的,相比,适度扩展的配置基础的影响。
The time-independent eigenstate-free Raman wavefunction approach, which is based on the vibrational inhomogeneous Schrödinger equation (ISE), is a promising alternative to the well-known sum-over-states and time-dependent methods for the calculation of optical bandshapes and resonance Raman intensities. The solution of the ISE, the Raman wavefunction (RWF), can be obtained within a vibrational configuration interaction (VCI) ansatz. In this method, the optimisation of vibrational modals can provide a better convergence of the calculated RWF towards the full VCI limit. For this purpose, the variational principle for the ISE problem is formulated. The variational condition for the modal functions leads to the complex inhomogeneous vibrational self-consistent field equations. The key aspects of the implementation of this approach are discussed. The performance of this method in comparison with the conventional scheme involving VCI bases of different quality is illustrated for theAAtransition in furan. The quantitative effects due to the modal optimisation are found to be relatively small, as compared to the impact of moderate extension of the configuration basis.
DOI: --
发表时间: 2017
影响因子: 5.5
作者:
T. Petrenko;G. Rauhut
通讯作者: G. Rauhut
呋喃 XÌâ2A2âXÌâ1A1 光电子能谱的精细分析
DOI: 10.1063/1.5018928
发表时间: 2018
期刊: The Journal of chemical physics
影响因子: --
作者:
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通讯作者: G. Rauhut
DOI: 10.1021/j100207a018
发表时间: 1982-01-01
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DOI: 10.1007/bf01125947
发表时间: 1995
期刊: Theoretica chimica acta
影响因子: --
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DOI: 10.1016/0009-2614(82)80335-7
发表时间: 1982-01-01
影响因子: 2.8
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CHRISTOFFEL, KM;BOWMAN, JM
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