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arXiv 1101.4832physics.comp-phphysics.chem-ph
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双原子分子电子与核动力学的多组态含时Hartree-Fock处理

Multiconfiguration Time-Dependent Hartree-Fock Treatment of Electronic and Nuclear Dynamics in Diatomic Molecules

Daniel J. Haxton, Keith V. Lawler, C. William McCurdy

摘要:

在不考虑Born-Oppenheimer近似的情况下,提出了多组态含时Hartree-Fock(MCTDHF)方法来处理双原子分子的电子-核耦合动力学。该方法处理的电子运动的全维,不使用模型的相互作用,并在原则上能够在电磁场中的一个精确的非相对论性的描述。扩展的波函数的配置的轨道,其依赖于核间的距离是唯一的基础扁长椭球坐标系提供的证明,以提供关键的简化的工作方程,使他们的实际解决方案。光电离截面也计算从MCTDHF波函数在计算中使用短脉冲。

英文摘要:

The multiconfiguration time-dependent Hartree-Fock (MCTDHF) method is formulated for treating the coupled electronic and nuclear dynamics of diatomic molecules without the Born- Oppenheimer approximation. The method treats the full dimensionality of the electronic motion, uses no model interactions, and is in principle capable of an exact nonrelativistic description of diatomics in electromagnetic fields. An expansion of the wave function in terms of configurations of orbitals whose dependence on internuclear distance is only that provided by the underlying prolate spheroidal coordinate system is demonstrated to provide the key simplifications of the working equations that allow their practical solution. Photoionization cross sections are also computed from the MCTDHF wave function in calculations using short pulses.

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