One extension to this method uses the Davidson correction to account for its size-inconsistency and addsa series of terms corresponding to single, double, etc. excitations.
One extension to this method uses the Davidson correction to account for its size-inconsistency and addsa series of terms corresponding to single, double, etc. excitations. Another extension to it uses the clusteroperator. Those methods are the full configuration interaction and coupled cluster methods, which takecorrelation into account. One quantity important in this method has a term that is equal to the sum over thedifferences of the Coulomb operator and the (*) exchange operator. This non-relativistic method assumes that amany-particle wavefunction is the anti-symmetrized product of several one-particle wavefunctions, and this methodrequires solving the energy equation until a self-consistent field is achieved. For 10 points, name this variationalmean-field method in quantum chemistry used to calculate the wavefunction of a many-electron system.
One extension to this method uses the Davidson correction to account for its size-inconsistency and addsa series of terms corresponding to single, double, etc. excitations.
Hartree-Fock method [accept coupled cluster or configuration interaction before mention]