title: Anomalous time correlation in two-dimensional driven diffusive systems.
abstract: We study the time-correlation function of a density field in two-dimensional driven diffusive systems within the framework of fluctuating hydrodynamics. It is found that the time correlation exhibits power-law behavior in an intermediate time regime in the case that the fluctuation-dissipation relation is violated and that the power-law exponent depends on the extent of this violation. We obtain this result by employing a renormalization group method to treat a logarithmic divergence in time.
authors.affiliation: Department of Pure and Applied Sciences, University of Tokyo, Komaba, Tokyo 153-8902, Japan. soushin@jiro.c.u-tokyo.ac.jp
authors.forename: Takenobu
authors.initials: T
authors.lastname: Nakamura
authors.forename: Michio
authors.initials: M
authors.lastname: Otsuki
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Sasa