TITLE:
Functional N-Representability in 2-Matrix, 1-Matrix, and Density Functional Theories
AUTHORS:
Eduardo V. Ludeña, F. Javier Torres, Cesar Costa
KEYWORDS:
N-Representability; DFT; D1-Matrix Theory; D2-Matrix Theory
JOURNAL NAME:
Journal of Modern Physics,
Vol.4 No.3A,
March
29,
2013
ABSTRACT: The N-representability conditions on the reduced second-order reduced density matrix (2-RDM), impose restrictions not only in the context of reduced density matrix theory (RDMT), but also on functionals advanced in one-matrix theory such as natural orbital functional theory (NOFT), and on functionals depending on the one-electron density such as those of density functional theory (DFT). We review some aspects of the applications of these N-representability conditions in these theories and present some conclusions.