A mathematical perspective on density functional perturbation theory

@article{Cancs2014AMP,
  title={A mathematical perspective on density functional perturbation theory},
  author={Eric Canc{\`e}s and Nahia Mourad},
  journal={arXiv: Mathematical Physics},
  year={2014}
}
This article is concerned with the mathematical analysis of the perturbation method for extended Kohn-Sham models, in which fractional occupation numbers are allowed. All our results are established in the framework of the reduced Hartree-Fock (rHF) model, but our approach can be used to study other kinds of extended Kohn-Sham models, under some assumptions on the mathematical structure of the exchange- correlation functional. The classical results of Density Functional Perturbation Theory in… 
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