Many body perturbation theory, diagrammatic

The localized many-body perturbation theory (LMBPT) applies localized HF orbitals which are unitary transforms of the canonical ones in the diagrammatic many-body perturbation theory. The method was elaborated on models of cyclic polyenes in the Pariser-Parr-Pople (PPP) approximation. These systems are considered as not well localized so they are suitable to study the importance of non local effects. The description of LMBPT follows the main points as it was first published in 1984 (Kapuy etal, 1983). 

The following important conclusion can be drown, that the diagrammatic many-body perturbation theory can be used in a localized representation. 

In the past twenty years, there has been increasing interest in the calculation of correlation energies and other properties of atomic and molecular systems by means of diagrammatic many-body perturbation theory techniques3-9 due to Brueckner10 and Goldstone.11 Diagrammatic many-body perturbation theory provides a simple pictorial representation of electron correlation effects in atoms... 

Wilson and co-workers conducted a series of experiments in vector and parallel processing based on the diagrammatic many-body perturbation theory (MBPT). Moncrieff, Baker, and Wilson" described an efficient evaluation of... 

Diagrammatic Many-Body Perturbation Theory of Molecular Electronic Structure A Review of Applications... 

G. Hose and U. Kaldor, /. Phys., B Atom. Mol. Phys., 12, 3827 (1979). Diagrammatic Many-Body Perturbation Theory for General Model Spaces. 

The pioneering work of Kelly on atoms provided the first comprehensive utilization of many-body theory methods to describe electron correlation in these systems. These studies investigated the use of diagrammatic many-body perturbation theory, an approach that appeared to be quite different from the more traditional wave function methods. However, if a... 

Concurrent computation and performance modelling ccMBPT. - Diagrammatic many-body perturbation theory leads directly to algorithms suitable for concurrent computation. The rules presented in Section 2.2 can be modified to enable a concurrent computation many-body perturbation theory (ccMBPT) algorithm to be constructed by introducing the additional diagrammatic convention... 

Diagrammatic many-body perturbation theory calculations of the correlation energy of various diatomic molecules in their ground states using universal basis sets of even-tempered exponential-type functions. Comparison with other approaches. ... 

Function counterpoise correction for the ground state of the neon atom calculated using diagrammatic many-body perturbation theory and employing a systematic sequence of even-tempered basis sets of Gaussian-type functions. In this table G represents a set of ghost orbitals. The NeG internuclear separation is 5.0 bohr. ... 

G. Hose and U. Kaldor, Diagrammatic many-body perturbation theory for general model spaces, J. Phys. B 12,3827 (1979) A general model space diagrammaticpeturbation theory, ... 

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