Correlation energy

{
  "id": "MLC-T-CHM-002602",
  "term": "Correlation energy",
  "field": "Chemistry",
  "definition": "The difference between the exact non-relativistic energy of a quantum mechanical system and the energy calculated using the Hartree-Fock approximation. It accounts for the instantaneous electron-electron interactions that are not fully captured by the mean-field approximation of Hartree-Fock theory. This energy is always negative and represents the stabilization due to electron correlation.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "hartree"
  ],
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2234 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/correlation-energy/"
}