Few-body bound topological and flat-band states in a Creutz Ladder
Few-body bound topological and flat-band states in a Creutz Ladder
We investigate the properties of few interacting bosons in a Creutz ladder, which has become a standard model for topological systems, and which can be realised in experiments with cold atoms in optical lattices. At the single-particle level, this system may exhibit a completely flat energy landscape with non-trivial topological …