ISSN:
1432-2234
Keywords:
31.10.+z
;
71.10.+x
;
31.15.+q
;
Perturbation theory
;
Quasiparticles
;
Feynman diagrams
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary Many-body perturbation theory is derived for chemical bonds. Paired quasiparticles represent the bonds. Products of the paired quasiparticles define a model Bardeen-Cooper-Schrieffer function. The pairing force is added as a model interaction to the self-consistent problem. The starting model is based on valency and adiabatic symmetry correlation. Symmetries are enforced by the model Hamiltonian. Perturbative corrections are expressed as ordinary Feynman diagrams. The number of diagrams needed is the same as for particle-hole theory.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01117400
