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arXiv 1306.6574physics.chem-phquant-ph
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关于Born-Oppenheimer近似的修正

On Corrections to the Born-Oppenheimer Approximation

Gerald I. Kerley

摘要:

本文介绍了在分子和凝聚态物质的量子力学计算中处理电子和原子核耦合的一种新方法。它包括标准的“玻恩-奥本海默近似”作为一个特殊情况,但对待绝热和非绝热修正使用微扰理论。绝热修正包括了所有没有明确涉及核波函数的项,因此原子核在单个电子势面上运动。非绝热修正允许原子核在不止一个势面上运动,包括电子波函数和原子核波函数之间的耦合。该方法与Born和Huang首先提出的方法有关,但在方法和电子波函数和势面的定义方面有所不同。一个简单的例子来说明该技术的机制。报告还包括对以往工作的审查。

英文摘要:

This report presents a new approach for treating the coupling of electrons and nuclei in quantum mechanical calculations for molecules and condensed matter. It includes the standard "Born-Oppenheimer approximation" as a special case but treats both adiabatic and non-adiabatic corrections using perturbation theory. The adiabatic corrections include all terms that do not explicitly involve the nuclear wavefunctions, so that the nuclei move on a single electronic potential surface. The non-adiabatic corrections, which allow the nuclei to move on more than one potential surface, include coupling between the electronic and nuclear wavefunctions. The method is related to an approach first proposed by Born and Huang, but it differs in the methodology and in the definition of the electronic wavefunctions and potential surfaces. A simple example is worked out to illustrate the mechanics of the technique. The report also includes a review of previous work.

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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