Are there localized saddles behind the heterogeneous dynamics of supercooled liquids?

Details Are there localized saddles behind the heterogeneous dynamics of supercooled liquids? Are there localized saddles behind the heterogeneous dynamics of supercooled liquids?

2006-07-12

arxiv.org/abs/cond-mat/0607306v1

Europhys. Lett. 75, 784 (2006)

Physics

Condensed Matter

Statistical Mechanics

7 pages, 3 figures, submitted to Europhys. Lett

Scientific paper

10.1209/epl/i2006-10175-8

We numerically study the interplay between heterogeneous dynamics and properties of negatively curved regions of the potential energy surface in a model glassy system. We find that the unstable modes of saddles and quasi-saddles undergo a localization transition close to the Mode-Coupling critical temperature. We also find evidence of a positive spatial correlation between clusters of particles having large displacements in the unstable modes and dynamical heterogeneities.

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