| Activated dynamics in a glassy system undergoing steady shear deformation is studied by numerical simulations. Our results show that the external driving force has a strong influence on the barrier crossing rate, even though the reaction coordinate is only weakly coupled to the nonequilibrium system. This driven activation can be quantified by introducing in the Arrhenius expression an effective temperature, which is close to the one determined from the fluctuation-dissipation relation. This conclusion is supported by analytical results for a simplified model system.
for LaTeX users @article{PIlg2007-79,
author = {P. Ilg and J.-L. Barrat},
title = {Driven activation vs. thermal activation},
journal = {EPL},
volume = {79},
pages = {26001},
year = {2007}
}
\bibitem{PIlg2007-79} P. Ilg, J.-L. Barrat,
Driven activation vs. thermal activation,
EPL {\bf 79} (2007) 26001.PIlg2007-79
P. Ilg, J.-L. Barrat
Driven activation vs. thermal activation
EPL,79,2007,26001 |
mk@mat.ethz.ch
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