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Activity statistics in a colloidal glass former: experimental evidence for a dynamical transition

Abstract : In a dense colloidal suspension at a volume fraction slightly lower than that of its glass transition, we follow the trajectories of an assembly of tracers over a large time window. We define a local activity, which quantifies the local tendency of the system to rearrange. We determine the statistics of the time and space integrated activity, and we argue that it develops a low activity tail that comes on a par with the onset of glassy behavior and heterogeneous dynamics. These rare events may be interpreted as the reflection of an underlying dynamic phase transition.
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https://hal.archives-ouvertes.fr/hal-01517340
Contributor : Vivien Lecomte <>
Submitted on : Wednesday, May 3, 2017 - 9:30:00 AM
Last modification on : Tuesday, July 28, 2020 - 6:18:21 PM

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Bérengère Abou, Rémy Colin, Vivien Lecomte, Estelle Pitard, Frédéric van Wijland. Activity statistics in a colloidal glass former: experimental evidence for a dynamical transition. Journal of Chemical Physics, American Institute of Physics, 2018, 148, pp.164502. ⟨10.1063/1.5006924⟩. ⟨hal-01517340⟩

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