Accession Number : AD0664073

Title :   QUANTUM THEORY OF MANY-PARTICLE SYSTEMS.

Descriptive Note : Final rept. 1 Sep 65-31 Aug 67,

Corporate Author : UPPSALA UNIV (SWEDEN) QUANTUM CHEMISTRY GROUP

Personal Author(s) : Lowdin,Per-Olov

Report Date : 31 AUG 1967

Pagination or Media Count : 25

Abstract : A brief summary is given of research directed towards the investigation of the electronic structure of atoms, molecules, and solidstate by means of quantum-mechanical methods. Results of particular importance have been obtained with respect to infinite-order perturbation theory, upper and lower bounds to energy eigenvalues, properties of density matrices, and the general understanding of many-body systems and the correlation problem. Applications were carried out to study the properties of various systems, including light atoms, comparatively small molecules, very large molecules, alkali halides, and alkali metals. Large-scale computations were carried out on the CD 3600 electronic computer available at Uppsala University.

Descriptors :   (*ATOMIC ORBITALS, *QUANTUM THEORY), (*MOLECULAR ORBITALS, QUANTUM THEORY), (*BAND THEORY OF SOLIDS, QUANTUM THEORY), PERTURBATION THEORY, FIELD THEORY, GROUPS(MATHEMATICS), MATRICES(MATHEMATICS), ATOMIC ENERGY LEVELS, ELASTIC PROPERTIES, MOLECULAR ASSOCIATION, SWEDEN

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Quantum Theory and Relativity
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE