Ground-state properties of the one-dimensional attractive Hubbard model with confinement: A comparative study
Ground-state properties of the one-dimensional attractive Hubbard model with confinement: A comparative study
We revisit the one-dimensional attractive Hubbard model by using the Bethe-ansatz based density-functional theory and density-matrix renormalization method. The ground-state properties of this model are discussed in details for different fillings and different confining conditions in weak-to-intermediate coupling regime. We investigate the ground-state energy, energy gap, and pair-binding energy and …