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Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2016

Mean-field dynamic criticality and geometric transition in the Gaussian core model

Daniele Coslovich
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Atsushi Ikeda
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Kunimasa Miyazaki
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Résumé

We use molecular dynamics simulations to investigate dynamic heterogeneities and the potential energy landscape of the Gaussian core model (GCM). Despite the nearly Gaussian statistics of particles' displacements, the GCM exhibits giant dynamic heterogeneities close to the dynamic transition temperature. The divergence of the four-point susceptibility is quantitatively well described by the inhomogeneous version of the mode-coupling theory. Furthermore, the potential energy landscape of the GCM is characterized by large energy barriers, as expected from the lack of activated, hopping dynamics, and display features compatible with a geometric transition. These observations demonstrate that all major features of mean-field dynamic criticality can be observed in a physically sound, three-dimensional model.
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Dates et versions

hal-01310191 , version 1 (01-06-2021)

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Daniele Coslovich, Atsushi Ikeda, Kunimasa Miyazaki. Mean-field dynamic criticality and geometric transition in the Gaussian core model. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2016, 93 (4), pp.042602. ⟨10.1103/PhysRevE.93.042602⟩. ⟨hal-01310191⟩
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