Current correlations and quantum localization in two-dimensional disordered systems with broken time-reversal invariance - art. no. 115403

We study long-range correlations of equilibrium current densities in a two- dimensional mesoscopic system with the time-reversal invariance broken by a random or homogeneous magnetic field. Our result is universal, i.e., it do es not depend on the type (random potential or random magnetic field) or co rrelation length of disorder. Performing a closely connected analysis of th e quantum correction to the conductivity in one-loop order, we show that it is nondivergent, in contrast to a recent claim in the literature.