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A correlation‐energy functional from a correlation‐factor model
Author(s) -
Fuentealba P.
Publication year - 1994
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.560490417
Subject(s) - correlation , ansatz , statistical physics , energy (signal processing) , work (physics) , reliability (semiconductor) , physics , quantum mechanics , mathematics , geometry , power (physics)
Abstract In this work, a way to approximate the correlation energy functional starting from a model correlation factor is shown. The problem is addressed by using formally exact properties of the second‐order density matrix and actual values of correlation energies for atoms. An Ansatz for the correlation factor is proposed that allows one to derive some known and some new correlation energy density functionals. Results for atomic systems show the reliability of the approach. © 1994 John Wiley & Sons, Inc.