Polyakov loops and SU(2) staggered Dirac spectra

Details Polyakov loops and SU(2) staggered Dirac spectra Polyakov loops and SU(2) staggered Dirac spectra

2008-02-05

arxiv.org/abs/0802.0662v1

PoS(LATTICE 2007)274

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 4 figures, talk given by M. Panero at the XXV International Symposium on Lattice Field Theory, Regensburg, Germany, 3

Scientific paper

We consider the spectrum of the staggered Dirac operator with SU(2) gauge fields. Our study is motivated by the fact that the antiunitary symmetries of this operator are different from those of the SU(2) continuum Dirac operator. In this contribution, we investigate in some detail staggered eigenvalue spectra close to the free limit. Numerical experiments in the quenched approximation and at very large $\beta$-values show that the eigenvalues occur in clusters consisting of eight eigenvalues each. We can predict the locations of these clusters for a given configuration very accurately by an analytical formula involving Polyakov loops and boundary conditions. The spacing distribution of the eigenvalues within the clusters agrees with the chiral symplectic ensemble of random matrix theory, in agreement with theoretical expectations, whereas the spacing distribution between the clusters tends towards Poisson behavior.

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