At small lattice spacing QCD simulations are expected to become stuck in a single topological sector. Observables evaluated in a fixed topological sector differ from their counterparts in full QCD, i.e. at unfixed topology, by volume dependent corrections. We investigate these corrections in the two-flavor Schwinger model, which is in several aspects similar to QCD, using Wilson fermions. We also try to remove these corrections by suitable extrapolations to infinite volume.
@article{arxiv.1310.5258,
title = {Lattice study of the Schwinger model at fixed topology},
author = {Christopher Czaban and Marc Wagner},
journal= {arXiv preprint arXiv:1310.5258},
year = {2016}
}