Ultracold bosonic atoms in two-colour superlattices
Ultracold bosonic atoms in two-colour superlattices
The influence of disorder on ultracold atomic Bose gases in optical lattices is discussed in the framework of the one-dimensional Bose–Hubbard model. It is shown that simple periodic modulations of the well depths generate a rich phase diagram consisting of superfluid, Mott insulator, Bose glass (BG) and spatially localized phases. …