Anomalous time correlation in two-dimensional driven diffusive systems
Takenobu Nakamura, Michio Otsuki, Shin-ichi Sasa
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.
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