Fluctuation-Dissipation relation in sub-diffusive systems: the case of granular single-file

D. Villamaina, A. Puglisi, A. Vulpiani

We study a gas of hard rods on a ring, driven by an external thermostat, with either elastic or inelastic collisions, which exhibits sub-diffusive behavior $<x^2>\sim t^{1/2}$. W…