Geometric approach to the dynamic glass transition

Tomás S. Grigera; Andrea Cavagna; Irene Giardina; Giorgio Parisi

Geometric approach to the dynamic glass transition

Tomás S. Grigera^*
, Andrea Cavagna
, Irene Giardina
, Giorgio Parisi

^*Corresponding author for this work

University of Rome La Sapienza

Research output: Contribution to journal › Article › peer-review

152 Scopus citations

Abstract

The potential energy landscape of a fragile glassy system was studied numerically. It was found that the dynamic crossover corresponding to the glass transition was due to an underlying geometric transition caused by the vanishing of the instability index of saddle points of the potential energy. The potential energy barrier connecting local glassy minima were also shown to be increased with the decreasing energy of the minima. The distribution of particle displacements for local minima connected by simple saddles was studied to analyze the real space structure of activated process.

Original language	English
Article number	055502
Pages (from-to)	555021-555024
Number of pages	4
Journal	Physical Review Letters
Volume	88
Issue number	5
State	Published - 4 Feb 2002
Externally published	Yes

Cite this

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abstract = "The potential energy landscape of a fragile glassy system was studied numerically. It was found that the dynamic crossover corresponding to the glass transition was due to an underlying geometric transition caused by the vanishing of the instability index of saddle points of the potential energy. The potential energy barrier connecting local glassy minima were also shown to be increased with the decreasing energy of the minima. The distribution of particle displacements for local minima connected by simple saddles was studied to analyze the real space structure of activated process.",

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N2 - The potential energy landscape of a fragile glassy system was studied numerically. It was found that the dynamic crossover corresponding to the glass transition was due to an underlying geometric transition caused by the vanishing of the instability index of saddle points of the potential energy. The potential energy barrier connecting local glassy minima were also shown to be increased with the decreasing energy of the minima. The distribution of particle displacements for local minima connected by simple saddles was studied to analyze the real space structure of activated process.

AB - The potential energy landscape of a fragile glassy system was studied numerically. It was found that the dynamic crossover corresponding to the glass transition was due to an underlying geometric transition caused by the vanishing of the instability index of saddle points of the potential energy. The potential energy barrier connecting local glassy minima were also shown to be increased with the decreasing energy of the minima. The distribution of particle displacements for local minima connected by simple saddles was studied to analyze the real space structure of activated process.

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Geometric approach to the dynamic glass transition

Abstract

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