Absence of correlations in the QCD Dirac spectrum at high temperature
High Energy Physics - Lattice
2010-11-11 v2 High Energy Physics - Theory
Abstract
I propose a simple model of the distribution of the small eigenvalues of the QCD Dirac operator well above the finite temperature phase transition where chiral symmetry is restored and the spectral density at zero vanishes. Assuming the absence of correlations between different regions of the low lying spectrum I derive analytic formulas for the distribution of the first two eigenvalues. I find good agreement with data obtained using the overlap Dirac operator in quenched SU(2) lattice simulations. This suggests that if chiral symmetry is restored spectral correlations are not important and all the statistical properties of the spectrum are encoded in the spectral density.
Keywords
Cite
@article{arxiv.0906.5373,
title = {Absence of correlations in the QCD Dirac spectrum at high temperature},
author = {Tamas G. Kovacs},
journal= {arXiv preprint arXiv:0906.5373},
year = {2010}
}
Comments
4 pages, some rewording for clarification; references added