Anomalous Collective Diffusion in One-dimensional Driven Granular Media

Yasuaki Kobayashi, Masaki Sano
2004 Journal of the Physical Society of Japan  
We numerically investigate the nonequilibrium steady state of a one-dimensional rarefied granular system in which each particle is driven by Gaussian white noise and subject to inelastic mutual collisions. We find that the dynamic structure factor S(q, t) decays as exp(−Dq 2 t 2 ), which is in marked contrast to the usual Fickian behavior exp(−Dq 2 t). Employing newly obtained S(q, t), we demonstrate that the static spatial correlation function and the one-point time correlation function obey the same scaling behavior.
doi:10.1143/jpsj.73.2697 fatcat:4iiuc7o7bjhtnfgc3sdaxn7zqa