Transcription of An Introduction to Density Functional Theory
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An Introduction to Density Functional Theory
An Introduction to Density Functional Theory N. M. Harrison Department of Chemistry, Imperial College of Science Technology and Medicine, SW7 2AY, London and CLRC, Daresbury Laboratory, Daresbury, Warrington, WA4 4AD. For the past 30 years Density Functional Theory has been the dominant method for the quantum mechanical simulation of periodic systems. In recent years it has also been adopted by quantum chemists and is now very widely used for the simulation of energy surfaces in molecules. In this lecture we introduce the basic concepts underlying Density Functional Theory and outline the features that have lead to its wide spread adoption. Recent developments in exchange correlation functionals are introduced and the performance of families of functionals reviewed.
Hohenburg and Kohn [8] gave a straightforward proof of this theorem, which was generalised to include systems with degenerate states in proof given by Levy in 1979 [9]. It is said that the theoretical spectroscopist E. B. Wilson put forward a very straightforward proof of this theorem during a meeting in 1965 at which it was being introduced.
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