arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1902.01431physics.chem-phphysics.comp-ph
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原子和双原子分子电子结构的非相对论全数值计算

A review on non-relativistic fully numerical electronic structure calculations on atoms and diatomic molecules

Susi Lehtola

摘要:

对原子和双原子分子的精确计算的需求是由这些研究的机会和挑战所激发的。本文结合Gaussian,Slater,a.k.a.等方法,讨论了全电子电子结构计算中最常用的方法--原子轨道线性组合(LCAO)方法。指数和数值径向函数。尽管LCAO计算具有很大的优点,但它们的缺点促使需要基于例如有限差分、有限元或离散变量表示的完全数值方法,也简要介绍了这些方法。简要回顾了全数值方法在一般分子中的应用,并讨论了其面临的挑战。指出原子和双原子分子的高度对称性可以用来构造更有效的全数值方法,然后可以直接在基组极限下对这些系统进行全电子Hartree-Fock和密度泛函计算。综述了全数值方法在原子和双原子分子计算中的应用。 最后, 对所述问题进行了总结与展望.

英文摘要:

The need for accurate calculations on atoms and diatomic molecules is motivated by the opportunities and challenges of such studies. The most commonly-used approach for all-electron electronic structure calculations in general - the linear combination of atomic orbitals (LCAO) method - is discussed in combination with Gaussian, Slater a.k.a. exponential, and numerical radial functions. Even though LCAO calculations have major benefits, their shortcomings motivate the need for fully numerical approaches based on, e.g. finite differences, finite elements, or the discrete variable representation, which are also briefly introduced. Applications of fully numerical approaches for general molecules are briefly reviewed, and their challenges are discussed. It is pointed out that the high level of symmetry present in atoms and diatomic molecules can be exploited to fashion more efficient fully numerical approaches for these special cases, after which it is possible to routinely perform all-electron Hartree-Fock and density functional calculations directly at the basis set limit on such systems. Applications of fully numerical approaches to calculations on atoms as well as diatomic molecules are reviewed. Finally, a summary and outlook is given.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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