Many‐body perturbation theory, coupled‐pair many‐electron theory, and the importance of quadruple excitations for the correlation problem

J. Bartlett, Rodney; D. Purvis, George

doi:10.1002/qua.560140504

Public

Many‐body perturbation theory, coupled‐pair many‐electron theory, and the importance of quadruple excitations for the correlation problem

Published in International Journal of Quantum Chemistry • Nov 1, 1978

Authors:

Rodney J. Bartlett

George D. Purvis

Abstract

Abstract Many‐body (diagrammatic) perturbation theory ( MBPT ), coupled‐pair many‐electron theory ( CPMET ), and configuration interaction ( CI ) are investigated with particular emphasis on the importance of quadruple excitations in correlation theories. These different methods are used to obtain s...

Subject

Perturbation theory (quantum mechanics)

Electronic correlation

Excitation

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