The Density Functional via Effective Action

Details The Density Functional via Effective Action The Density Functional via Effective Action

2009-09-21

arxiv.org/abs/0909.3673v1

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

A rigorous derivation of the density functional via the effective action in the Hohenberg-Kohn theory is outlined. Using the auxiliary field method, in which the electric coupling constant $e^2$ need not be small, we show that the loop expansion of the exchange-correlation functional can be reorganized so as to be expressed entirely in terms of the Kohn-Sham single-particle orbitals and energies.

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