Originally, the Hubbard model was derived for describing the behavior of strongly correlated
electrons in solids. However, for over a decade now, variations of it have also routinely been …

Cold atomic gases have become a paradigmatic system for exploring fundamental physics,
which at the same time allows for applications in quantum technologies. The accelerating …

We develop the multi-layer multi-configuration time-dependent Hartree method for bosons
(ML-MCTDHB), a variational numerically exact ab initio method for studying the quantum …

Systems of interacting bosons in triple-well potentials are of significant theoretical and
experimental interest. They are explored in contexts that range from quantum phase …

We show that multi-orbital and density-induced tunneling have a significant impact on the
phase diagram of bosonic atoms in optical lattices. Off-site interactions lead to density …

The precise control of quantum systems will play a major role in the realization of atomtronic
devices. As in the case of electronic systems, a desirable property is the ability to implement …

We unravel the polaronic properties of impurities immersed in a correlated trapped one-
dimensional Bose-Bose mixture. This setup allows the impurities to couple either attractively …

We investigate the ground state properties and the nonequilibrium dynamics of a lattice
trapped bosonic mixture consisting of an impurity species and a finite-sized medium. For the …

We explore the dynamical transport of an impurity between different embedding majority
species, which are spatially separated in a double well. The transfer and storage of the …

We calculate the renormalized effective two-, three-and four-body interactions for N neutral
ultracold bosons in the ground state of an isotropic harmonic trap, assuming two-body …