Class of variational singlet wave functions for the Hubbard model away from half filling
- 1 November 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 40 (13) , 8939-8944
- https://doi.org/10.1103/physrevb.40.8939
Abstract
We present a class of variational wave functions for strong-coupling Heisenberg Hubbard models. These are written in the form of three factors—a pair of determinants and a Jastrow function—and are made out of orbitals, a la Hartree-Fock theory, which solve a fictitious one-body problem. The wave functions respect various constraints known from general principles and appear to be potentially useful in understanding the possible behavior of the models in quantitative terms.Keywords
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