Flow-based sampling in the lattice Schwinger model at criticality

Recent results suggest that flow-based algorithms may provide efficient sampling of field distributions for lattice field theory applications, such as studies of quantum chromodynamics and the Schwinger model. In this work, we provide a numerical demonstration of robust flow-based sampling in the Schwinger model at the critical value of the fermion mass. In contrast, at the same parameters, conventional methods fail to sample all parts of configuration space, leading to severely underestimated uncertainties.

Automated summary

Recent results suggest that flow-based algorithms are efficient for sampling field distributions in lattice field theory applications. This study provides a numerical demonstration on the robustness of flow-based sampling in the Schwinger model at the critical fermion mass value. Conventional methods, on the other hand, fail to sample all parts of configuration space and lead to significantly underestimated uncertainties.