title: Mean-field dynamic criticality and geometric transition in the Gaussian core model.
abstract: 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.
authors.affiliation: Laboratoire Charles Coulomb, UMR 5221 CNRS-Université de Montpellier, Montpellier, France.
authors.forename: Daniele
authors.initials: D
authors.lastname: Coslovich
authors.affiliation: Fukui Institute for Fundamental Chemistry, Kyoto University, Kyoto, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Ikeda
authors.affiliation: Department of Physics, Nagoya University, Nagoya, Japan.
authors.forename: Kunimasa
authors.initials: K
authors.lastname: Miyazaki