We show that correlated pair tunneling drives a phase transition to a twisted superfluid with
a complex order parameter. This unconventional superfluid phase spontaneously breaks the …

In one-dimensional systems a twisted superfluid phase is found which is induced by a
spontaneous breaking of the time-reversal symmetry. Using the density-matrix …

We investigate a binary mixture of bosonic atoms loaded into a state-dependent honeycomb
lattice. For this system, the emergence of a so-called twisted-superfluid ground state was …

The structure of a two-dimensional honeycomb optical lattice potential with small inversion
asymmetry is characterized using coherent diffraction of Rb 87 atoms. We demonstrate that …

We study several effects which lead to symmetry-broken momentum distributions of quantum
gases released from optical lattices. In particular, we demonstrate that the interaction within …

We demonstrate that low-lying triplon excitations in a bilayer Heisenberg antiferromagnet
provide a promising avenue to realize magnetic analogs of twisted superfluid and supersolid …

This cumulative dissertation deals with the stationary and dynamical properties of highly
particle imbalanced atomic mixtures of bosons trapped in various one-dimensional confining …