A comparative study of overlap and staggered fermions in QCD

Abstract

We perform a comparative study of the infrared properties of overlap and staggered fermions in QCD. We observe that the infrared spectrum of the APE/HYP improved staggered Dirac operator develops a four-fold near-degeneracy and is in quantitative agreement with the infrared spectrum of the overlap operator. The near-degeneracy allows us to identify the zero modes of the staggered operator and we find that the number of zero modes is in line with the topological index of the overlap operator.

arXiv commentTalk presented at Lattice2004(chiral), Fermilab, June 21-26, 2004, 3 pages, 2 figures

References in corpus (7)

• Random matrix theory and spectral sum rules for the Dirac operator in QCD
• Chiral Determinant as an Overlap of Two Vacua
• Staggered eigenvalue mimicry
• The Index Theorem and Universality Properties of the Low-lying Eigenvalues of Improved Staggered Quarks
• Staggered versus overlap fermions: a study in the Schwinger model with $N_f=0,1,2$
• Topology and Staggered Fermion Action Improvement
• The Index Theorem and Random Matrix Theory for Improved Staggered Quarks

Cited by in corpus (1)

• Lattice QCD with mixed actions