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arXiv physics/0703178physics.atom-ph
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原子密度函数的量子相似性研究:信息论的启示和相对论效应的作用

A Quantum Similarity Study of Atomic Density Functions: Insights from Information Theory and the Role of Relativistic Effects

A. Borgoo, M. Godefroid, Paul Indelicato, F. De Proft, P. Geerlings

摘要:

基于信息论的概念,构造了一种新的量子相似性测度。在应用QSM的原子,新的QSM及其相应的量子相似性指数(QSI)的评估整个周期表,使用的原子电子密度和形状函数计算的Hartree-Fock近似。门捷列夫表的周期性是第一次通过评估的QSM。然而,基于信息论的QSI的评价表明,由于QSM的重整化,周期性的模式丢失,产生化学上不太吸引人的QSI结果。将一个群顶部的给定原子的信息量与后续行中元素的信息量进行比较,揭示了另一种周期性模式。研究了相对论效应对原子电子密度函数的影响。它们的重要性在QSI研究中通过比较每个原子的Hartree-Fock和Dirac-Fock近似中评估的密度函数来量化。相关QSI沿周期表的平滑下降以定量的方式说明了相对论修正随核电荷的增加。

英文摘要:

A novel quantum similarity measure (QSM) is constructed based on concepts from information theory. In an application of QSM to atoms, the new QSM and its corresponding quantum similarity index (QSI) are evaluated throughout the periodic table, using the atomic electron densities and shape functions calculated in the Hartree-Fock approximation. The periodicity of Mendeleev's table is regained for the first time through the evaluation of a QSM. Evaluation of the information theory based QSI demonstrates, however, that the patterns of periodicity are lost due to the renormalization of the QSM, yielding chemically less appealing results for the QSI. A comparison of the information content of a given atom on top of a group with the information content of the elements in the subsequent rows reveals another periodicity pattern. Relativistic effects on the electronic density functions of atoms are investigated. Their importance is quantified in a QSI study by comparing for each atom, the density functions evaluated in the Hartree-Fock and Dirac-Fock approximations. The smooth decreasing of the relevant QSI along the periodic table illustrates in a quantitative way the increase of relativistic corrections with the nuclear charge.

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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