title: A toy model mimicking cage effect, structural fluctuations, and kinetic constraints in supercooled liquids.
abstract: In this work, we implement new toy models coined to reproduce the cage effect with variants including structural fluctuations and different kinetic constraints. We introduce structural fluctuations in the models from a distribution of the cages opening probabilities and a kinetic constraint from a variation of that probability with the local number of molecules involved in the creation of the cage. We model separately the caging mean field experienced by each molecule, and the cooperative mechanism with the kinetic constraint condition. We find that strong dynamic heterogeneities are present in the models with kinetic constraints. We find that the heterogeneities do not depend on the cage escaping probabilities, while the heterogeneities increase sharply with the strengthening of the kinetic constraint conditions.
authors.affiliation: Laboratoire de Photonique d'Angers EA 4464, Physics Department, Université d'Angers, 2 Bd Lavoisier, 49045 Angers, France.
authors.forename: V
authors.initials: V
authors.lastname: Teboul