Probing an nonequilibrium Einstein relation in an aging colloidal glass
Bérengère Abou, Francois Gallet
Abstract
We present a direct experimental measurement of an effective temperature in a colloidal glass of Laponite, using a micrometric bead as a thermometer. The nonequilibrium fluctuation-dissipation relation, in the particular form of a modified Einstein relation, is investigated with diffusion and mobility measurements of the bead embedded in the glass. We observe an unusual non-monotonic behavior of the effective temperature : starting from the bath temperature, it is found to increase up to a maximum value, and then decreases back, as the system ages. We show that the observed deviation from the Einstein relation is related to the relaxation times previously measured in dynamic light scattering experiments.
Create a lesson
Related papers
Competing routes to spontaneous flow in confined active nematics
Rahil N. Valani, Vedad Dzanic, Sumesh P. Thampi et al.
Scaling and Condensation of Dry Active Matter Around Circular Obstacles
Felipe P. S. Júnior, F. Q. Potiguar, Jorge L. C. Domingos et al.
Active Hydrodynamics Couples Polymer Organization, Shape Fluctuations, and Motility in Deformable Droplets
Ritu Raj, P. B. Sunil Kumar
Inferring interactions between active particles using harmonic traps
Arnaud Compagnie, Joscha Mecke, Ivo Buttinoni et al.
Spontaneous filament formation and network self-assembly via active phase separation
Elena Lucas, Varun Venkatesh, Amin Doostmohammadi
Sensitivity of Nucleation Thermodynamics and Kinetics to the Treatment of Long-Range Interactions
Fernanda Sulantay Vargas, Kimia Sinaeian, Amir Haji-Akbari