This post is inspired by this post: What correlation effects are included in DFT?

The Kohn-Sham density functional theory (KS-DFT) are considered to be exact and can include all correlation effects in principle. However, if we want to apply DFT to perform practical calculations, we must make some approximations to the exchange-correlation energy, such as the famous local density approximation (LDA) and generalized gradient approximation (GGA).

My question is what correlation effects are included in KS-DFT with LDA and GGA?

  • $\begingroup$ +1 for another interesting question by Jack! However, can you please fix up the links a little bit? This is something I often do for new users, but it would be nice if people could gradually get in the habit of making pristine posts themselves :) $\endgroup$ – Nike Dattani Jan 23 at 4:37
  • $\begingroup$ @NikeDattani Seems there is a problem with the LDA link in Wikipedia. $\endgroup$ – Jack Jan 23 at 5:58

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