Abstract
In this chapter we explain insights arrived at via Quantal density functional theory (Q-DFT) of two popular approximation schemes within the framework of local effective potential energy theory. The first of these is the local density approximation (LDA) for ‘exchange’ [1] and ‘exchange-correlation’ [2] as applied within Kohn-Sham (KS) density functional theory [3]. The second is Slater theory [4] for ‘exchange’, the LDA within its context [4], and the Slater Xcti approximation scheme [5] to incorporate Coulomb correlations. The LDA and Slater theory are both ad hoc formulations.
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Sahni, V. (2004). Further Insights Derived Via Quantal Density Functional Theory. In: Quantal Density Functional Theory. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-09624-6_8
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DOI: https://doi.org/10.1007/978-3-662-09624-6_8
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