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arXiv 1507.08591physics.chem-phphysics.atm-clusphysics.comp-phquant-ph
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稀有气体二聚体中的范德华相互作用:粒子间相互作用的作用

Van der Waals interactions in rare-gas dimers: The role of interparticle interactions

Yu-Ting Chen, Kerwin Hui, Jeng-Da Chai

摘要:

我们研究了具有不同范围和强度的粒子间相互作用(核-电子、电子-电子和核-核相互作用)的稀有气体二聚体的势能曲线。我们的研究是基于与这些粒子间相互作用相关的高精度耦合团簇理论。为了比较,相应的Hartree-Fock理论,二阶Moller-Plesset微扰理论,和密度泛函理论的性能也进行了研究。我们的研究结果表明,当粒子间相互作用保留长程库仑尾,在稀有气体二聚体的范德华相互作用的性质仍然是相似的。相比之下,当粒子间的相互作用是足够短的范围内,在稀有气体二聚体的传统范德华相互作用完全消失,产生纯粹的排斥势能曲线。

英文摘要:

We investigate the potential energy curves of rare-gas dimers with various ranges and strengths of interparticle interactions (nuclear-electron, electron-electron, and nuclear-nuclear interactions). Our investigation is based on the highly accurate coupled-cluster theory associated with those interparticle interactions. For comparison, the performance of the corresponding Hartree-Fock theory, second-order Moller-Plesset perturbation theory, and density functional theory is also investigated. Our results reveal that when the interparticle interactions retain the long-range Coulomb tails, the nature of van der Waals interactions in the rare-gas dimers remains similar. By contrast, when the interparticle interactions are sufficiently short-range, the conventional van der Waals interactions in the rare-gas dimers completely disappear, yielding purely repulsive potential energy curves.

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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