Staggered domain wall fermions

TL;DR

This paper introduces staggered domain wall fermions, demonstrating significant improvements in chiral symmetry properties in both the Schwinger model and four-dimensional QCD compared to traditional methods.

Contribution

The paper develops and tests staggered domain wall fermions, showing substantial enhancements in chiral symmetry preservation over conventional domain wall fermions.

Findings

Chirality improved by over an order of magnitude in the Schwinger model.

Significant reduction of chiral symmetry violations in four-dimensional QCD.

First numerical results indicating benefits of staggered kernel in fermion formulations.

Abstract

We construct domain wall fermions with a staggered kernel and investigate their spectral and chiral properties numerically in the Schwinger model. In some relevant cases we see an improvement of chirality by more than an order of magnitude as compared to usual domain wall fermions. Moreover, we present first results for four-dimensional quantum chromodynamics, where we also observe significant reductions of chiral symmetry violations for staggered domain wall fermions.