paper

Kovacs-like memory effect in driven granular gases

arXiv:1404.6162 · doi:10.1103/PhysRevLett.112.198001

Abstract

While memory effects have been reported for dense enough disordered systems such as glasses, we show here by a combination of analytical and simulation techniques that they are also intrinsic to the dynamics of dilute granular gases. By means of a certain driving protocol, we prepare the gas in a state where the granular temperature coincides with its long time limit. However, does not subsequently remain constant, but exhibits a non-monotonic evolution before reaching its non-equilibrium steady value. The corresponding so-called Kovacs hump displays a normal behavior for weak dissipation (as observed in molecular systems), but is reversed under strong dissipation, where it thus becomes anomalous.

arXiv comment5 pages, to appear in Physical Review Letters

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