Constructing Improved Overlap Fermions in QCD
W. Bietenholz, N. Eicker, I. Hip, K. Schilling
TL;DR
This paper presents a method to construct approximate Ginsparg-Wilson fermions for QCD, optimizing their spectrum and convergence properties for use in overlap formulas, aiming to improve lattice QCD simulations.
Contribution
It introduces an explicit construction of improved overlap fermions based on perfect action principles, enhancing spectral properties and computational efficiency.
Findings
Optimized fermion spectrum at beta=6
Fermions show improved convergence in overlap calculations
Potential for more efficient lattice QCD simulations
Abstract
We describe an explicit construction of approximate Ginsparg-Wilson fermions for QCD. We use ingredients of perfect action origin, and further elements. The spectrum of the lattice Dirac operator reveals the quality of the approximation. We focus on beta =6 for optimisation. Such fermions are intended to be inserted into the overlap formula. Hence we also test the speed of convergence under polynomial evaluation of the overlap formula.
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