In this paper we analyze the spectral level statistics of the one-dimensional ionic Hubbard
model, the Hubbard model with an alternating on-site potential. In particular, we focus on the …

We study the phase diagram of the ionic Hubbard model (IHM) at half filling on a Bethe
lattice of infinite connectivity using dynamical mean-field theory (DMFT), with two impurity …

The dynamical mean field theory (DMFT) has emerged as one of the most important
frameworks for theoretical investigations of strongly correlated lattice models and real …

We introduce the concept of self-energy dispersion as an error bound on local theories and
apply it to the two-dimensional Hubbard model on the square lattice at half filling. Since the …

We consider the strongly correlated limit of variants of the Hubbard model in which on parts
of the system it is energetically favorable to project out doublons from the low-energy Hilbert …

The interaction-driven insulator-to-metal transition has been reported in the ionic Hubbard
model (IHM) for moderate interaction U, while its metallic phase only occupies a narrow …

The ionic Hubbard model in a two-dimensional square lattice is revisited using determinant
quantum Monte Carlo (DQMC) and numerical analytic continuation. From the dc conductivity …

We report the emergence or broadening of exotic magnetic metallic phases upon explicit
breaking of SU (2) symmetry by introduction of mass imbalance in a variant of Hubbard …

We investigated the ionic Hubbard model with mass imbalance in one dimension, using the
density matrix renormalization group method. This model exhibits a band insulator phase …

Topological phases set themselves apart from other phases since they cannot be
understood in terms of the usual Landau theory of phase transitions. This fact, which is a …