On the Necessary Conditions for the Validity of the Hohenberg-Kohn Theorem

Details On the Necessary Conditions for the Validity of the Hohenberg-Kohn Theorem On the Necessary Conditions for the Validity of the Hohenberg-Kohn Theorem

2010-08-14

arxiv.org/abs/1008.2455v1

Physics

Condensed Matter

Statistical Mechanics

7 pages, no figures

Scientific paper

It is shown that the Hohenberg-Kohn lemma and theorem are direct consequences of the statement that the ground state energy (or free energy) of a system of interacting particles in an external field is a unique functional of the potential of this field. This means that, if the Hohenberg-Kohn theorem is valid, the nonuniform density in the equilibrium system and the external field potential are biunique functionals. In this case, the nonuniform density is intimately related to the inverse response function. On this basis, a regular procedure can be constructed for determining the density functional for the free energy or ground state energy.

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