  Topological freezing is a well known problem in lattice simulations: with
shrinking lattice spacing a transition between topological sectors becomes
increasingly improbable, leading to a problematic increase of the
autocorrelation time regarding several observables. We present our
investigation of metadynamics as a solution for topological freezing in the
Schwinger model. Specifically, we take a closer look at the collective variable
and its scaling behaviour, visualize the effects of topological freezing and
how metadynamics helps in that respect and explore alternatives for a more
efficient building process. Possible implications for and differences to
four-dimensional SU(3) theory are briefly discussed.
