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

作者：Abou Berengere^*; Colin Remy; Lecomte Vivien; Pitard Estelle; van Wijland Frederic

来源：Journal of Chemical Physics, 2018, 148(16): 164502.

DOI：10.1063/1.5006924

In a dense colloidal suspension at a volume fraction below the 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 integrated activity, and we argue that it develops a low activity tail that comes together with the onset of glassy-like behavior and heterogeneous dynamics. These rare events may be interpreted as the reflection of an underlying dynamic phase transition. Published by AIP Publishing.

• 出版日期2018-4-28