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• W2022338979 startingPage "7110" @default.
• W2022338979 abstract "We show that a simple correlated wave function, obtained by applying a Jastrow correlation term to an antisymmetrized geminal power, based upon singlet pairs between electrons, is particularly suited for describing the electronic structure of molecules, yielding a large amount of the correlation energy. The remarkable feature of this approach is that, in principle, several resonating valence bonds can be dealt simultaneously with a single determinant, at a computational cost growing with the number of electrons similar to more conventional methods, such as Hartree-Fock or density functional theory. Moreover we describe an extension of the stochastic reconfiguration method, which was recently introduced for the energy minimization of simple atomic wave functions. Within this extension the atomic positions can be considered as further variational parameters, which can be optimized together with the remaining ones. The method is applied to several molecules from Li2 to benzene by obtaining total energies, bond lengths and binding energies comparable with much more demanding multiconfiguration schemes." @default.
• W2022338979 created "2016-06-24" @default.
• W2022338979 creator A5018474352 @default.
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• W2022338979 date "2004-10-01" @default.
• W2022338979 modified "2023-10-09" @default.
• W2022338979 title "Correlated geminal wave function for molecules: An efficient resonating valence bond approach" @default.
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• W2022338979 doi "https://doi.org/10.1063/1.1794632" @default.
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