Projecting onto you get: . if is known to then is known to .

Expansion for : (defining V)

. Note that is not normalized.

Define . Then . Note that and , , and . normalization: . Define . Then . Then

In general, corrections get smaller.

source

psfile jl@crush.caltech.edu index

time_independent_perturbation_theory

perturbation_theory

variational_helium

TDPT