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Open AccessJournal ArticleDOI

Note on an Approximation Treatment for Many-Electron Systems

Chr. Møller, +1 more
- 01 Oct 1934 - 
- Vol. 46, Iss: 7, pp 618-622
TLDR
In this article, a perturbation theory for treating a system of n electrons in which the Hartree-Fock solution appears as the zero-order approximation was developed, and it was shown by this development that the first order correction for the energy and the charge density of the system is zero.
Abstract
A perturbation theory is developed for treating a system of n electrons in which the Hartree-Fock solution appears as the zero-order approximation. It is shown by this development that the first order correction for the energy and the charge density of the system is zero. The expression for the second-order correction for the energy greatly simplifies because of the special property of the zero-order solution. It is pointed out that the development of the higher approximation involves only calculations based on a definite one-body problem.

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Exploration of the Conformational and Reactive Dynamics of Glycine and Diglycine on TiO2: Computational Investigations in the Gas Phase and in Solution

TL;DR: In this article, the adsorption of glycine on TiO2 in the gas phase and the behavior of a set of preadsorbed diglycine (Gly-Gly) molecules in solution are studied by using classical nonreactive and reactive (ReaxFF) simulations.
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A quantitative account of quantum effects in liquid water.

TL;DR: Simulations of liquid water with the Thole-type Model (version 2.1), Flexible, polarizable (TTM2.1-F) interaction potential for water show quantitative agreement with experiment for the heights and broadening of the intramolecular OH and HH peaks in the radial distribution functions.
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A molecular mechanics force field for lignin

TL;DR: A CHARMM molecular mechanics force field for lignin is derived and will enable full simulations of lignocellulose and is validated by performing a molecular dynamics simulation of a crystal of aLignin fragment molecule and comparing simulation‐derived structural features with experimental results.
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Detailed mechanism of squalene epoxidase inhibition by terbinafine.

TL;DR: The results, elucidating at a molecular level the mode of terbinafine inhibitory activity, can be utilized in designing more potent or selective antifungal drugs or even medicines lowering cholesterol in humans.
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Inverse Hydrogen-Bonded Complexes

TL;DR: In this paper, a theoretical study of the linear and multiple approximation in a series of complexes formed by molecules with electron-rich hydrogen atoms has been carried out, where the interaction energy (taking into account the zero-point energy and the basis set superposition error), the atomic charges, and the electron density of the monomers and complexes have been evaluated at the MP2/6-311++G** level.
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