Localization and chiral symmetry in 2+1 flavor domain wall QCD

Abstract

We present results for the dependence of the residual mass of domain wall fermions (DWF) on the size of the fifth dimension and its relation to the density and localization properties of low-lying eigenvectors of the corresponding hermitian Wilson Dirac operator relevant to simulations of 2+1 flavor domain wall QCD. Using the DBW2 and Iwasaki gauge actions, we generate ensembles of configurations with a $16^3\times 32$ space-time volume and an extent of 8 in the fifth dimension for the sea quarks. We demonstrate the existence of a regime where the degree of locality, the size of chiral symmetry breaking and the rate of topology change can be acceptable for inverse lattice spacings $a^{-1}\ge 1.6$ GeV.

59 Pages, 23 figures, 1 MPG linked

References in corpus (4)

• Accelerating Dynamical Fermion Computations using the Rational Hybrid Monte Carlo (RHMC) Algorithm with Multiple Pseudofermion Fields
• Lattice gauge action suppressing near-zero modes of H_W
• Accelerating Staggered Fermion Dynamics with the Rational Hybrid Monte Carlo (RHMC) Algorithm
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• Chiral Symmetry and the Residual Mass in Lattice QCD with the Optimal Domain-Wall Fermion
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• Unphysical poles and dispersion relations for Möbius domain-wall fermions in free field theory at finite $L_s$