1D-to-3D crossover on multileg attractive-U Hubbard ladders

We study ground state properties of a polarized two-component Fermi gas on multileg attractive-U Hubbard ladders. Using DMRG simulations, we construct grand canonical phase diagrams for varying perpendicular geometries and ratios of hopping amplitudes, and charactrize the 1D-to-3D crossover. We compare our findings with recent experiemental and theoretical studies of quasi-one-dimensional polarized Fermi gases.