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Thomas–Fermi term as the simplest correction to the Weizsacker term
Author(s) -
Ludeñta Eduardo V.
Publication year - 1983
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.560230114
Subject(s) - term (time) , physics , context (archaeology) , operator (biology) , kinetic term , thomas–fermi model , kinetic energy , plane wave , function (biology) , plane (geometry) , fermi gamma ray space telescope , wave function , quantum electrodynamics , quantum mechanics , mathematical physics , electron , mathematics , chemistry , geometry , scalar field , evolutionary biology , gene , transcription factor , biology , paleontology , biochemistry , repressor
The nature of the correlation function G (1,2) appearing in the definition of the reduced first order density operator γ′(1,2) = ρ(1) 1/2 ρ(2) 1/2 G (1,2) is analyzed. It is shown that when G (1,2) is expanded in terms of plane waves in the context of a single‐determinant approximation to the wave function, the correction to the Weizsacker term in the kinetic energy density expression is the Thomas–Fermi term.