Local-density approximation: Difference between revisions

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The '''local-density approximation''' (LDA) is an approximation of the [[Exchange interaction|exchange]]-[[Electron correlation|correlation]] (XC) energy functional in [[density functional theory]] (DFT) by taking the XC energy of an electron in a non-interacting homogeneous [[Free electron model|electron gas]] of a density equivalentequal to the density at the electron in the system being calculated (which in general is inhomogeneous). This approximation was applied to DFT by [[Walter Kohn|Kohn]] and [[Lu Jeu Sham|Sham]] in an early paper.<ref name=kohn-sham>{{cite journal | author = W. Kohn and L. J. Sham | title =

Self-Consistent Equations Including Exchange and Correlation Effects | journal = Phys. Rev. | volume = 140 | pages = A1133 - A1138 | year = 1965 | url = http://link.aps.org/abstract/PR/v140/pA1133 | doi = 10.1103/PhysRev.140.A1133 }}</ref>