Statistical mechanics of the stroogsy-correlatsd hubbard chains i, formulation

Abstract

We show with the aid of a canonical transformation that separates charge and spin degrees of freedom that the strongly correlated one-dimensional Hubbard model with infinite (17 = co) on-site repulsion is related to a corresponding spinless free-fermion lattice model. Thermodynamic properties of the two models are shown to be closely related whereas the single-particle two-site function for the U =∞ model is shown to be related to a modified many site function for the spinless model which involves many-pomt correlations The latter is shown to be expressible m terms of the inverse of a certain matrix which should be amenable to numerical and analytical analysis. © 1991 IOP Publishing Ltd.