Saddles in the energy landscape probed by supercooled liquids
Abstract
We numerically investigate the supercooled dynamics of two simple model liquids exploiting the partition of the multi-dimension configuration space in basins of attraction of the stationary points (inherent saddles) of the potential energy surface. It is shown that the so obtained inherent saddles order and potential energy are well defined functions of the temperature T. Moreover, decreasing T, the saddle order vanishes at the same temperature (T_c) where the inverse diffusivity diverges as a power law. This allows a topological interpretation of T_c: it marks the transition from a dynamics between basins of saddles (T>T_c) to a dynamics between basins of minima (T<T_c).Keywords
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