Collect. Czech. Chem. Commun. 1995, 60, 1419-1428

Brillouin-Wigner Perturbation Theory as a Possible more Effective Alternative to Many-Body Rayleigh-Schrodinger Perturbation Theory and Coupled Cluster Theory

Petr Čárskya, Vojtěch Hroudaa, Vladimír Sychrovskýa, Ivan Hubačb, Peter Babinecb, Pavol Machb, Ján Urbanb and Jozef Mášikb

a J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, 182 23 Prague 8, Czech Republic
b Division of Chemical Physics, Comenius University, 842 15 Bratislava, Slovak Republic


Brillouin-Wigner perturbation theory is revisited using the Lippmann-Schwinger equation and applied to the H2O molecule. The results obtained are examined from the view-point of the development of practical computational methods.