Hartree-Fock approximation

Hartree-Fock approximation

[′här·trē ‚fäk ə‚präk·sə‚mā·shən]
(quantum mechanics)
A refinement of the Hartree method in which one uses determinants of single-particle wave functions rather than products, thereby introducing exchange terms into the Hamiltonian.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In this approximation, the single-particle excitations are obtained in the mean field approximation, while the collective modes are obtained by solving the BS equation in which single-particle Green's functions are calculated in Hartree-Fock approximation, and the BS kernel is obtained by summing ladder and bubble diagrams.
The Cowan codes are based on the Hartree-Fock approximation with some relativistic corrections [8].
The Hamiltonian was simplified by linearising the intra-atomic Coulomb interaction with the Hartree-Fock approximation then the f-electron band energy was [E.sub.k] = [[epsilon].sub.f] + [Un.sub.[sigma]], where [[epsilon].sub.f] was bare f-electron energy and [Un.sub.[sigma]] was the Coulomb energy of f-electron.