215 citations
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physics.atom-ph2009★ 8 cited
Fourier-Legendre expansion of the one-electron density-matrix of ground-state two-electron atoms
Sebastien Ragot, Maria Belen Ruiz
The density-matrix rho(r, r') of a spherically symmetric system can be expanded as a Fourier-Legendre series of Legendre polynomials Pl(cos(theta) = r.r'/rr'). Application is here…
physics.atom-ph2008★ 4 cited
Comments on the momentum density and the spatial form of the density-matrix of the Hooke's atom
Ragot Sebastien
In a recent paper, A. Akbari, N. H. March and A. Rubio [Phys. Rev. A. 76, 032510 (2007)] have investigated the one-electron reduced density-matrix and the momentum density of sever…
physics.atom-ph2006★ 28 cited
Exact Kohn-Sham versus Hartree-Fock in momentum-space: examples of two-fermion systems
Sebastien Ragot
The question of how density functional theory (DFT) compares with Hartree-Fock (HF) for the computation of momentum-space properties is addressed in relation to systems for which (…