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• W2008920194 abstract "For closed-shell systems, the local density approximation (LDA) and the LYP, BLYP, and B3LYP functionals are shown to be compatible with reference-state one-particle density-matrix theory, where this recently introduced formalism is based on Brueckner-orbital theory and an energy functional that includes exact exchange and a non-universal correlation-energy functional. The method is demonstrated to reduce to a density functional theory when the exchange-correlation energy-functional has a simplified form, i.e., its integrand contains only the coordinates of two electron, say r1 and r2, and it has a Dirac delta function -- delta(r1 - r2) -- as a factor. Since Brueckner and Hartree--Fock orbitals are often very similar, any local exchange functional that works well with Hartree--Fock theory is a reasonable approximation with reference-state one-particle density-matrix theory. The LDA approximation is also a reasonable approximation. However, the Colle--Salvetti correlation-energy functional, and the LYP variant, are not ideal for the method, since these are universal functionals. Nevertheless, they appear to provide reasonable approximations. The B3LYP functional is derived using a linear combination of two functionals: One is the BLYP functional; the other uses exact exchange and a correlation-energy functional from the LDA." @default.
• W2008920194 created "2016-06-24" @default.
• W2008920194 creator A5070771613 @default.
• W2008920194 date "2004-04-10" @default.
• W2008920194 modified "2023-10-16" @default.
• W2008920194 title "Using the local density approximation and the LYP, BLYP and B3LYP functionals within reference-state one-particle density-matrix theory" @default.
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• W2008920194 doi "https://doi.org/10.1080/00268970410001687452" @default.
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