450 citations · 1.2k across the 21 of their papers we have counts for
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Resolving Exceptional Configurations
W. Bardeen, A. Duncan, E. Eichten +2
In lattice QCD with Wilson fermions, exceptional configurations arise in the quenched approximation at small quark mass. The origin of these large previously uncontrolled lattice a…
QED2 as a testbed for interpolations between quenched and full QCD
W. Bardeen, A. Duncan, E. Eichten +1
Lattice QED2 with the Wilson formulation of fermions is used as a convenient model system to study artifacts of the quenched approximation on a finite lattice. The quenched functio…
Quenched Approximation Artifacts: A study in 2-dimensional QED
W. Bardeen, A. Duncan, E. Eichten +1
The spectral properties of the Wilson-Dirac operator in 2-dimensional QED responsible for the appearance of exceptional configurations in quenched simulations are studied in detail…
Light Quarks, Zero Modes, and Exceptional Configurations
W. Bardeen, A. Duncan, E. Eichten +2
In continuum QCD, nontrivial gauge topologies give rise to zero eigenvalues of the massless Dirac operator. In lattice QCD with Wilson fermions, these zero modes appear as exactly…