Taming lattice artifacts with Pauli-Villars fields

Anna Hasenfratz, Yigal Shamir, Benjamin Svetitsky

Research output: Contribution to journalArticlepeer-review


As fermions are added to a lattice gauge theory, one is driven to stronger bare coupling in order to maintain the same renormalized coupling. Stronger bare couplings are usually associated with larger gauge fluctuations, leading to larger cutoff effects and more expensive simulations. In theories with many light fermions, sometimes the desired physical region cannot be reached before encountering a phase boundary. We show that these undesired effects can be reduced by adding Pauli-Villars fields. We reach significantly larger renormalized couplings while at the same time damping short-distance fluctuations of the gauge field. This may allow for controlled continuum extrapolations from large lattice spacings.

Original languageEnglish
Article number074509
JournalPhysical Review D
Issue number7
StatePublished - 1 Oct 2021


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