Kovacs effect and fluctuation-dissipation relations in 1D kinetically constrained models

Details Kovacs effect and fluctuation-dissipation relations in 1D kinetically constrained models Kovacs effect and fluctuation-dissipation relations in 1D kinetically constrained models

2003-10-14

arxiv.org/abs/cond-mat/0310311v1

J. Phys. A: Math. Gen. 36 (2003) 12367-12377

Physics

Condensed Matter

Statistical Mechanics

13 pages and 7 figures. To be published in J. Phys. A

Scientific paper

10.1088/0305-4470/36/50/002

Strong and fragile glass relaxation behaviours are obtained simply changing the constraints of the kinetically constrained Ising chain from symmetric to purely asymmetric. We study the out-of-equilibrium dynamics of those two models focusing on the Kovacs effect and the fluctuation--dissipation relations. The Kovacs or memory effect, commonly observed in structural glasses, is present for both constraints but enhanced with the asymmetric ones. Most surprisingly, the related fluctuation-dissipation (FD) relations satisfy the FD theorem in both cases. This result strongly differs from the simple quenching procedure where the asymmetric model presents strong deviations from the FD theorem.

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