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arXiv 2302.11999physics.chem-ph
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Slater轨道基组中来自完全组态相互作用的交换相关势

Exchange Correlation Potentials from Full Configuration Interaction in a Slater Orbital Basis

Soumi Tribedi, Duy-Khoi Dang, Bikash Kanungo, Vikram Gavini, Paul M. Zimmerman

AI总结:

本文首次将RKS理论与Slater原子轨道基组结合,利用完全组态相互作用波函数构建无伪影的交换相关势,并证明核尖点条件对其成功至关重要。

摘要:

Ryabinkin–Kohut–Staroverov(RKS)理论在波函数理论与密度泛函理论之间架起了一座桥梁:它利用来自前者的物理量来生成后者所需的精确交换相关势。在本工作中,RKS方法首次与Slater原子轨道基函数一同得到发展和测试。为评估这一方法,研究采用Slater轨道中的完全组态相互作用(Full Configuration Interaction)计算,为RKS方法提供高质量输入,从而能够包含完全相关,并具有正确的原子核尖点以及波函数的渐近衰减。结果将表明,RKS方法是一种高效算法,可在中等规模基组中得到没有非物理伪影的交换相关势。此外,研究还将表明,强制满足核尖点条件对于Slater基RKS方法的成功至关重要。弱相关和强相关分子体系的示例将展示Slater RKS的主要特征。

英文摘要:

Ryabinkin-Kohut-Staroverov (RKS) theory builds a bridge between wave function theory and density functional theory by using quantities from the former to produce accurate exchange-correlation potentials needed by the latter. In this work, the RKS method is developed and tested alongside Slater atomic orbital basis functions for the first time. To evaluate this approach, Full Configuration Interaction computations in the Slater orbitals are employed to give quality input to RKS method, allowing full correlation to be present along with correct nuclei cusps and asymptotic decay of the wavefunction. The RKS method will be shown to be an efficient algorithm to arrive at exchange correlation potentials without unphysical artifacts in moderately-sized basis sets. Furthermore, enforcement of the nuclear cusp conditions will be shown to be vital for the success of the Slater-basis RKS method. Examples of weakly and strongly correlated molecular systems will demonstrate the main features of Slater RKS.

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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