Universality of the Hohenberg-Kohn functional
classification
⚛️ physics.ed-ph
cond-mat.mtrl-sci
keywords
functionalapproximationhohenberg-kohnnealanalyticarguearticlecomment
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We comment on a recent article by H. L. Neal [Am. J. Phys. 66, 512 (1998)], in which an analytic expression for the Hohenberg-Kohn functional was derived for one-dimensional two-particle systems with the harmonic interaction. We argue that the functional given by Neal is not exact but really constitutes an approximation in the same spirit as the local-density approximation.
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