Random matrix model for QCD_3 staggered fermions

Details Random matrix model for QCD_3 staggered fermions Random matrix model for QCD_3 staggered fermions

2010-06-02

arxiv.org/abs/1006.0360v1

Phys.Rev.D83:014507,2011

Physics

High Energy Physics

High Energy Physics - Lattice

8 pages 4 figures

Scientific paper

10.1103/PhysRevD.83.014507

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.

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