Density functionals derived from Feynman diagrams

Details Density functionals derived from Feynman diagrams Density functionals derived from Feynman diagrams

2009-10-10

arxiv.org/abs/0910.1935v2

Physics

Nuclear Physics

Nuclear Theory

37 pages; rewritten with 2 appendeces, misprints corrected, new derivation of Kohn-Sham orbits the use of which is shown to be

Scientific paper

We construct a stationary density functional for the partition function from a chosen set of one (boson) line irreducible Feynman diagrams. The construction does not proceed by the inversion of a Legendre transform. It is formulated for fermions with Coulomb interactions, in which case a stationary functional of the particle density is contructed, as well as for nucleons interacting with mesons, which involves a stationary functional of several densities. The use of Kohn-Sham orbits is shown to be an unnecessary complication.

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