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Exchange and correlation and their defernces

  1. Nov 22, 2012 #1
    What is the deferences between Exchange and correlation and also what is Exchange-correlation hole?
  2. jcsd
  3. Nov 23, 2012 #2
    In fact I want to know that whether sum of the charges of exchange hole and correlation hole is +e (e:electron charge) or each of them has the charge +e so that some of their charges is +2e?
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