Ashirbad Padhan

We predict a complete delocalization of the localized states following the localization transition in a one-dimensional non-Hermitian Aubry-André model with a generalized quasiperiodic potential. We show that the system first undergoes a transition from the delocalized phase to the localized phase and then to the delocalized phase as a function of the complex phase of the quasiperiodic potential of fixed strength revealing a reentrant delocalization transition.

Abstract Bosons in periodic potentials with very strong local interactions, known as constrained bosons, often exhibit interesting physical behavior. We investigate the ground-state properties of a two-leg Bose-Hubbard ladder by imposing a three-body constraint in one leg and a hard-core constraint in the other.