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[77] On a Unified Canonical Treatment of the Large-Negative- (Positive-) U Hubbard Model


The Schrieffer-Wolff transformation of the large-negative-U Hubbard model is performed in detail. Similarities to and differences from the canonical transformation of the large-positive-U Hamiltonian into the t-J model are discussed.

J. Phys. A: Math. Gen.. Bd. 23, 1990, S. L837.
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