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Møller–Plesset perturbation theory
Møller–Plesset perturbation theory
(
MP
) is one of several
quantum chemistry
post-Hartree–Fock
ab initio methods
in the field of
computational chemistry
. It improves on the
Hartree–Fock
method by adding
electron correlation
effects by means of Rayleigh–Schrödinger
perturbation theory
(RS-PT), usually to second (MP2), third (MP3) or fourth (MP4) order. Its main idea was published as early as 1934 by
Christian Møller
and
Milton S. Plesset
.
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