Interacting electrons model exactly solvable in any dimension
- 18 March 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 66 (11) , 1383-1387
- https://doi.org/10.1103/physrevlett.66.1383
Abstract
When processes not conserving the double occupation number are inhibited, one obtains a model like the Kivelson-Schrieffer-Su-Heeger extension of the Hubbard model. We solve this model exactly in any number of dimensions. The system free energy is given for any fixed filling. The ground-state energy and double-occupancy order parameter are discussed for d=2.Keywords
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