Excess noise for driven diffusive systems

H. Van Beijeren, R. Kutner, H. Spohn

Research output: Contribution to journalArticlepeer-review

247 Scopus citations


We investigate the steady-state scattering function for driven diffusive systems with a single conserved density. In one dimension, density fluctuations spread as t23, i.e., faster than the diffusive t12, for large time t. The corresponding excess noise in the current-current correlation diverges as -13 for small frequency. Monte Carlo simulation results for a driven hard-core lattice gas confirm these results. d=2 is the borderline dimension with marginally nondiffusive behavior; for d>2, the spread is diffusive with anisotropic long-time-tail corrections.

Original languageEnglish
Pages (from-to)2026-2029
Number of pages4
JournalPhysical Review Letters
Issue number18
StatePublished - 1985
Externally publishedYes


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