Local-density approximation: Difference between revisions

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The '''local-density approximation''', (LDA), is a [[density fuinctionalfunctional theory|density functional]] [[model]] in [[physics]], which approximates the [[electron correlation]] energy with respect to the ''local'' [[electron density]]. In this sense, ''local'' means that, within the LDA model, the electron correlation at any point in space is a function of the electron density at that point in space only.

The LDA functional is derived from a model assuming that the per-electron exchange-correlation energy at every point in space is equal to the per-electron exchange-correlation energy of a homogeneous electron gas. This model is sometimes known as the [[Jellium]] model.