CHIRAL DISORDER IN QCD

Using the Gell-Mann-Oakes-Renner relation and semiclassical arguments, we show that the bulk quark spectrum in QCD exhibits a variety of reg imes including the ergodic one described by random matrix theory. We a nalyze the quark spectral form factor in the diffusive and ballistic r egime. We suggest that a class of chiral transitions in QCD is possibl y of the metal-insulator type, with a universal spectral statistics at the mobility edge. [S0031-9007(98)06589-2].