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Coupled cluster
Coupled cluster
(
CC
) is a numerical technique used for describing
many-body systems
. Its most common use is as one of several
post-Hartree–Fock
ab initio
quantum chemistry
methods in the field of
computational chemistry
. It essentially takes the basic
Hartree–Fock
molecular orbital
method and constructs multi-electron wavefunctions using the exponential cluster operator to account for
electron correlation
. Some of the most accurate calculations for small to medium-sized molecules use this method.
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