Algebraic and Diagrammatic Methods in Many-Fermion Theory

This text on the use of electron correlation effects in the description of the electronic structure of atoms, molecules, and crystals is intended for graduate students in physical chemistry and physics. Modern theories of electronic structure and methods of incorporating electron correlation contributions are developed using a diagrammatic and algebraic formulation, and the methods developed in the text are illustrated with examples from molecular and solid state quantum mechanics. 
A brief Introduction is followed by chapters on operator algebra, the independent-particle model, occupation-number formalism, and diagrams. Additional topics include the configuration-interaction method, the many-body perturbation theory, and the coupled-cluster method.

Acest text privind utilizarea efectelor de corelatie a electronilor in descrierea structurii electronice a atomilor, moleculelor si cristalelor este destinat studentilor absolventi in chimie fizica si fizica. Teoriile moderne ale structurii electronice si metodele de incorporare a contributiilor de corelatie electronica sunt dezvoltate folosind o formulare schematica si algebrica, iar metodele dezvoltate in text sunt ilustrate cu exemple din mecanica cuantica in stare moleculara si solida. O scurta introducere este urmata de capitole despre algebra operatorului, modelul de particule independente, formalismul numarului de ocupatie si diagrame.