Random matrix model for QCD_3 staggered fermions

Abstract

We show that the lowest part of the eigenvalue density of the staggered fermion operator in lattice QCD_3 at small lattice coupling constant beta has exactly the same shape as in QCD_4. This observation is quite surprising, since universal properties of the QCD_3 Dirac operator are expected to be described by a non-chiral matrix model. We show that this effect is related to the specific nature of the staggered fermion discretization and that the eigenvalue density evolves towards the non-chiral random matrix prediction when beta is increased and the continuum limit is approached. We propose a two-matrix model with one free parameter which interpolates between the two limits and very well mimics the pattern of evolution with beta of the eigenvalue density of the staggered fermion operator in QCD_3.

8 pages 4 figures

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Cited by in corpus (7)

• Dirac Spectra of 2-dimensional QCD-like theories
• Localisation in 2+1 dimensional SU(3) pure gauge theory at finite temperature
• GUE-chGUE Transition preserving Chirality at finite Matrix Size
• Shift of Symmetries of Naive Fermions in QCD-like Lattice Theories
• Symmetry Transition Preserving Chirality in QCD: A Versatile Random Matrix Model
• In search for the pairing glue in cuprates by non-equilibrium optical spectroscopy
• Symmetry Crossover Protecting Chirality in Dirac Spectra