  It is a well-understood fact that the transport of excitations throughout a
lattice is intimately governed by the underlying structures. Hence, it is only
natural to recognize that also the dispersion of information has to depend on
the lattice geometry. In the present work, we demonstrate that two-dimensional
lattices described by the Bose-Hubbard model exhibit information scrambling for
systems as little as two hexagons. However, we also find that the OTOC shows
the exponential decay characteristic for quantum chaos only for a judicious
choice of local observables. More generally, the OTOC is better described by
Gaussian-exponential convolutions, which alludes to the close similarity of
information scrambling and decoherence theory.
