We present a method of construction of exact localized many-body eigenstates of the
Hubbard model in decorated lattices, both for U= 0 and U→∞. These states are localized in …

We study spinless fermions in a flux threaded AB 2 chain taking into account nearest-
neighbor Coulomb interactions. The exact diagonalization of the spinless AB 2 chain is …

We study the mean-field phase diagram of the repulsive Hubbard model in the Lieb lattice.
Far from half-filling, the most stable phases are paramagnetism for low on-site interaction U/t …

We study the current, the curvature of levels, and the finite temperature charge stiffness, D
(T, L), in the strongly correlated limit U≫ t for Hubbard rings of L sites, with U the on-site …

We study the mean-field phase diagram of the two-dimensional (2D) Hubbard model in the
Lieb lattice allowing for spin and charge density waves. Previous studies of this diagram …

We present the solution of the one-dimensional t− V model with twisted boundary conditions
in the strong coupling limit, t≪ V and show that this model can be mapped onto the strong …

In this paper we consider the one-dimensional Hubbard model and study the deviations
from the ground-state values of double occupation which result from creation or annihilation …

Many-body localized states are shown to exist in geometrically frustrated lattices if the
interacting Hamiltonian generates a network of transition matrix elements between many …

We address the possibility of spiral ferrimagnetic phases in the mean-field phase diagram of
the two-dimensional (2D) Hubbard model. For intermediate values of the interaction U (6≲ …

We study the charge and spin currents transported by the elementary excitations of the one-
dimensional (1D) Hubbard model and derive the corresponding current spectra. We present …