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首页> 外文期刊>Philosophical magazine, B. Physics of condensed matter, electronic, optical, and magnetic properties >A direct derivation of the optimized effective potential using orbital perturbation theory
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A direct derivation of the optimized effective potential using orbital perturbation theory

机译:利用轨道扰动理论直接推导最佳有效势

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摘要

The Hartree-Fock (HP) orbitals and energies are related to the Kohn-Sham (KS) orbitals and energies through an orbital perturbation theory. While the HF method is proposed as a density functional theory, the equalization of the HF density and the KS density leads to a constraint on the perturbation terms. To first order, this constraint gives the standard optimized effective potential (OEP) equation. Further, it is shown that operating the Laplacian operator on the above constraint will lead naturally to Nagy's local effective exchange potential obtained by summarizing the HF and the KS single particle motion equations. The higher order perturbation terms, the Green's function version of the approach and the inclusion of the correlation in the OEP equation using this method are briefly discussed. [References: 36]
机译:Hartree-Fock(HP)轨道和能量通过轨道微扰理论与Kohn-Sham(KS)轨道和能量相关。虽然将HF方法作为密度泛函理论提出,但HF密度和KS密度的均衡导致对摄动项的约束。首先,该约束条件给出了标准的优化有效电位(OEP)方程。此外,表明在上述约束条件下对Laplacian算符进行运算自然会导致通过汇总HF和KS单粒子运动方程式而获得的Nagy局部有效交换势。简要讨论了高阶摄动项,该方法的格林函数形式以及使用该方法在OEP方程中包含相关性的情况。 [参考:36]

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