DFT: Thomas-Fermi model

This lecture covers the Thomas-Fermi model in Density Functional Theory (DFT), where the electron-electron interaction is approximated by the classical Coulomb energy of a charge distribution. It discusses the Thomas-Fermi Approximation, exchange and correlation effects, and the challenges in expressing the kinetic energy as a functional of the density. The instructor also introduces the precursors of Kohn-Sham DFT, the 'true' Density Functional Methods, and the Kohn and Sham Formulation of DFT, highlighting the mapping of the many-electron problem onto an auxiliary noninteracting reference system.