I will use the spontaneous breaking of chiral symmetry in QCD together with semi-classical arguments to establish that light quarks diffuse on a proper-time scale. As a result, I will show that light quarks undergo ballistic, diffusive and ergodic behavior much like electrons in dirty metals. I will use this analogy to suggest that changes in the QCD parameters may yield a localization transition with fractal exponents. The transition is distinguishable from a second order or a percolation transition, and can be tested using present day lattice algorithms. I will finally show that the concept of weak-localization applies to two-color QCD and can be exhibited through Aharanov-Bohm like effects.

Monday, September 21st 1998, 15:30
Ernest Rutherford Physics Building, room 305