In the first section we specify an insulator as a substance with a vanishing electrical
conductivity in a (weak) static electrical field at zero temperature. The transport of electrical …

The extended Hubbard model in one dimension is studied for half-filled bands using a
continuum theory based on the Luttinger model. Interactions going beyond the Luttinger …

We present the exact ground-state wave function and energy of a general Hubbard model
with kinetic energy t and on-site, nearest-neighbor, and bond-charge interaction U, V, X …

We obtain the exact solution of a general Hubbard chain with kinetic energy t, bond-charge
interaction X, and on-site repulsion U with the only restriction t= X. At zero temperature and …

We introduce in this Letter an exact solvable BCS-Hubbard model in arbitrary dimensions.
The model describes ap-wave BCS superconductor with equal spin pairing moving on a …

An overview of lattice models for strongly correlated electrons is given. A detailed study is
presented of a model recently introduced by Montorsi and Rasetti. Analytical, exact …

We generalize the η-pairing theory in Hubbard models to the ones with spin-orbit coupling
(SOC) and obtain the conditions under which the η-pairing operator is an eigenoperator of …

The electron correlations in narrow energy bands are examined within the framework of the
Hubbard model, generalized by taking into account the correlated hopping of electrons …

An extension of the Hubbard model, introduced by Montorsi and Rasetti, is studied using
exact diagonalization and quantum Monte Carlo methods. Our numerical results for the …

We present the exact ground-state wave function and energy of the generalized Hubbard
model, subject to the condition that the number of doubly occupied sites is conserved. For a …