Taming lattice artifacts with Pauli-Villars fields
| Autor: | Benjamin Svetitsky, Anna Hasenfratz, Yigal Shamir |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Coupling 010308 nuclear & particles physics High Energy Physics::Lattice High Energy Physics - Lattice (hep-lat) FOS: Physical sciences Fermion Gauge (firearms) 01 natural sciences Lattice (module) symbols.namesake High Energy Physics - Lattice Pauli exclusion principle Quantum electrodynamics Lattice gauge theory 0103 physical sciences symbols Cutoff Gauge theory 010306 general physics |
| Zdroj: | Physical Review |
| Popis: | 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. Comment: 7 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|