We present a theory of the superfluid weight in multiband attractive Hubbard models within
the Bardeen-Cooper-Schrieffer (BCS) mean-field framework. We show how to separate the …

Using dynamical mean-field theory and exact diagonalization we study the phase diagram
of the repulsive Haldane-Hubbard model, varying the interaction strength and the sublattice …

The superfluid properties of attractive Hubbard model in dice lattice are investigated. It is
found that three superfluid order parameters increase as the interaction increases. When the …

We introduce the adiabatic quantum Monte Carlo (AQMC) method, where we gradually
crank up the interaction strength, as an amelioration of the sign problem. It is motivated by …

The superfluid states of attractive Hubbard model in α–T 3 lattice are investigated. It is found
that one usual needs three non-zero superfluid order parameters to describe the superfluid …

We consider a generic Hamiltonian that is suitable for describing a uniform BCS superfluid
on a lattice with a two-point basis and study its collective excitations at zero temperature. For …

The interplay between topology and correlation lies at the forefront of modern condensed
matter physics. In this paper, we study the extended fermion-Hubbard model, including the …

Using mean field method and random phase approximation, we studied the phase driven
topological exotic states in correlated Haldane model on a honeycomb lattice. It is found that …

Ultracold atom experiments allow the study of topological insulators, such as the non-
interacting Haldane model. In this work we study a generalization of the Haldane model with …

The experimental realizations of spin-orbit coupling (SOC) in cold atom gases put
topological superfluids (TSs) under the spotlight. The topological protection of suggested …