Møller–Plesset perturbation theory
= Møller–Plesset perturbation theory
{wiki=Møller–Plesset_perturbation_theory}
Møller–Plesset perturbation theory (MP theory) is a quantum mechanical method used to calculate the electronic structure of many-body systems, particularly in quantum chemistry. It is based on perturbation theory, which provides a way to approximate the properties of a complicated system by starting from a simpler one and systematically adding corrections.