Abstract
This article is concerned with the mathematical analysis of the Kohn-Sham and extended Kohn-Sham models, in the local density approximation (LDA) and generalized gradient approximation (GGA) frameworks. After recalling the mathematical derivation of the Kohn-Sham and extended Kohn-Sham LDA and GGA models from the Schrödinger equation, we prove that the extended Kohn-Sham LDA model has a solution for neutral and positively charged systems. We then prove a similar result for the spin-unpolarized Kohn-Sham GGA model for two-electron systems, by means of a concentration-compactness argument.
| Original language | English |
|---|---|
| Pages (from-to) | 2425-2455 |
| Number of pages | 31 |
| Journal | Annales de l'Institut Henri Poincare (C) Analyse Non Lineaire |
| Volume | 26 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Jan 2009 |
Keywords
- Concentration-compactness
- Density functional theory
- Electronic structure
- Kohn-Sham
- Variational methods
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