Staggered eigenvalue mimicry

Journal Article · Mon Nov 01 00:00:00 EST 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.094502· OSTI ID:20705643

Duerr, Stephan ^[1]; Hoelbling, Christian ^[2]; Wenger, Urs ^[3]

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1. DESY Zeuthen, Platanenallee 6, D-15738 Zeuthen (Germany)
2. Centre de Physique Theorique, Case 907, CNRS Luminy, F-13288 Marseille Cedex 9 (France)
3. NIC/DESY Zeuthen, Platanenallee 6, D-15738 Zeuthen (Germany)

We study the infrared part of the spectrum for UV-filtered staggered Dirac operators and compare them to the overlap counterpart. With sufficient filtering and at small enough lattice spacing the staggered spectra manage to 'mimic' the overlap version. They show a 4-fold near degeneracy, and a clear separation between would-be zero modes and nonzero modes. This suggests an approximate index theorem for filtered staggered fermions and a correct sensitivity to the topology of QCD. Moreover, it supports square-rooting the staggered determinant to obtain dynamical ensembles with N{sub f}=2.

• OSTI ID: 20705643
• Journal Information: Physical Review. D, Particles Fields, Vol. 70, Issue 9; Other Information: DOI: 10.1103/PhysRevD.70.094502; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPARATIVE EVALUATIONS
DIRAC OPERATORS
EIGENFUNCTIONS
EIGENVALUES
FERMIONS
FLAVOR MODEL
LATTICE FIELD THEORY
QUANTUM CHROMODYNAMICS
SENSITIVITY
TOPOLOGY