Calculation of singlet and triplet excitation energies, ionization potentials, and electron affinities of closed-shell systems by many-body Rayleigh-Schrödinger perturbation theory

1974 ◽  
Vol 60 (11) ◽  
pp. 4483-4487 ◽  
Author(s):  
Vlado Kvasnička ◽  
Ivan Hubač
Keyword(s):  
Perturbation Theory ◽  
Closed Shell ◽  
Ionization Potentials ◽  
Electron Affinities ◽  
Many Body ◽  
Excitation Energies ◽  
Triplet Excitation ◽  
Schrödinger Perturbation

Excitation energies with multireference many‐body perturbation theory

1990 ◽  
Vol 93 (3) ◽  
pp. 1847-1856 ◽  
Author(s):  
Leszek Meissner ◽  
Stanislaw A. Kucharski ◽  
Rodney J. Bartlett
Keyword(s):  
Perturbation Theory ◽  
Many Body ◽  
Excitation Energies ◽  
Many Body Perturbation Theory

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

1995 ◽  
Vol 60 (9) ◽  
pp. 1419-1428 ◽  
Author(s):  
Petr Čársky ◽  
Vojtěch Hrouda ◽  
Vladimír Sychrovský ◽  
Ivan Hubač ◽  
Peter Babinec ◽  
...  
Keyword(s):  
Perturbation Theory ◽  
Computational Methods ◽  
Effective Alternative ◽  
Coupled Cluster ◽  
View Point ◽  
Many Body ◽  
Coupled Cluster Theory ◽  
Cluster Theory ◽  
Schrödinger Perturbation

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.

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