Metal-insulator transitions are accompanied by huge resistivity changes, even over tens of
orders of magnitude, and are widely observed in condensed-matter systems. This article …

A new approach to the single-band Hubbard model is described in the general context of
many-body theories. It is based on enforcing conservation laws, the Pauli principle and a …

We develop a slave-boson theory for the t− J model at finite doping which respects an SU (2)
symmetry—a symmetry previously known to be important at half filling. The mean field phase …

We study the evolution of a Mott-Hubbard insulator into a correlated metal upon doping in
the two-dimensional Hubbard model using the cellular dynamical mean-field theory. Short …

We review recent results for the properties of doped antiferromagnets, obtained by the
numerical analysis of the planar tJ model using the novel finite-temperature Lanczos method …

This is a short review of the theoretical work on the two-dimensional Hubbard model
performed in Sherbrooke in the last few years. It is written on the occasion of the twentieth …

We develop a slave-boson theory for the t− J model at finite doping that respects an SU (2)
symmetry: a symmetry previously known to be important at half filling. The mean-field phase …

The numerical studies of dx 2-y 2-wave pairing in the two-dimensional (2D) and the 2-leg
Hubbard models are reviewed. For this purpose, the results obtained from the determinantal …

The properties of a phase with large correlation length can be strongly influenced by the
underlying normal phase. We illustrate this by studying the half-filled two-dimensional …

Numerical studies of the two-dimensional Hubbard model have shown that it exhibits the
basic phenomena seen in the cuprate materials. At half-filling one finds an antiferromagnetic …