Expansion Dynamics of Interacting Bosons in Homogeneous Lattices in One and Two Dimensions
Expansion Dynamics of Interacting Bosons in Homogeneous Lattices in One and Two Dimensions
We experimentally and numerically investigate the expansion of initially localized ultracold bosons in homogeneous one- and two-dimensional optical lattices. We find that both dimensionality and interaction strength crucially influence these non-equilibrium dynamics. While the atoms expand ballistically in all integrable limits, deviations from these limits dramatically suppress the expansion and …