Statistical Theory of Many-Electron Systems. Discrete Bases of Representation
- 1 September 1957
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 107 (5) , 1283-1290
- https://doi.org/10.1103/physrev.107.1283
Abstract
The density matrix for a many-electron system has been examined. A formalism has been arrived at which facilitates its evaluation in terms of a basis corresponding to a discrete spectrum of eigenvalues. This allows a representation to be employed associated with a suitably chosen approximation to the Hamiltonian. Thereby, reasonably accurate estimates of the properties of many-electron systems may be anticipated for low orders of approximation.Keywords
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