Improving the Dirac Operator in Lattice QCD

Details Improving the Dirac Operator in Lattice QCD Improving the Dirac Operator in Lattice QCD

2001-11-22

arxiv.org/abs/hep-lat/0111043v1

Comput.Phys.Commun.147:398-401,2002

Physics

High Energy Physics

High Energy Physics - Lattice

Contrib. to Conf. on Comp. Physics, Sept. 2001 (Aachen); 4 pages, 4 figures, (LaTeX style files cpauth.cls, elsart.cls)

Scientific paper

10.1016/S0010-4655(02)00313-2

Recently various new concepts for the construction of Dirac operators in lattice Quantum Chromodynamics (QCD) have been introduced. These operators satisfy the so-called Ginsparg-Wilson condition (GWC), thus obeying the Atiyah-Singer index theorem and violating chiral symmetry only in a modest and local form. Here we present studies in 4-d for SU(3) gauge configurations with non-trivial topological content. We study the flow of eigenvalues and we compare the numerical stability and efficiency of a recently suggested chirally improved operator with that of others in this respect.

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