Equivalence of driven and ageing fluctuation-dissipation relations in the trap model

Details Equivalence of driven and ageing fluctuation-dissipation relations in the trap model Equivalence of driven and ageing fluctuation-dissipation relations in the trap model

2002-09-27

arxiv.org/abs/cond-mat/0209645v2

Physical Review E, 67:011101, 2003

Physics

Condensed Matter

Statistical Mechanics

7 pages, 4 figures

Scientific paper

10.1103/PhysRevE.67.011101

We study the non-equilibrium version of the fluctuation dissipation (FD) relation in the glass phase of a trap model that is driven into a non-equilibrium steady state by external ``shear''. This extends our recent study of ageing FD relations in the same model, where we found limiting, observable independent FD relations for ``neutral'' observables that are uncorrelated with the system's average energy. In this work, for such neutral observables, we find the FD relation for a stationary weakly driven system to be the same, to within small corrections, as for an infinitely aged system. We analyse the robustness of this correspondence with respect to non-neutrality of the observable, and with respect to changes in the driving mechanism.

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