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oai:docta.ucm.es:20.500.14352/1167162025-03-18T15:24:20Zcom_20.500.14352_14col_20.500.14352_15

Seoane Bartolomé, Beatriz Zamponi, Francesco 2025-01-28T18:51:50Z 2025-01-28T18:51:50Z 2018 B. Seoane and F. Zamponi, Soft Matter, 2018, 14, 5222–5234. 1744-683X 10.1039/C8SM00859K https://hdl.handle.net/20.500.14352/116716 1744-6848 https://doi.org/10.1039/C8SM00859K https://pubs.rsc.org/en/content/articlelanding/2018/sm/c8sm00859k https://arxiv.org/pdf/1803.05031 Motivated by the mean field prediction of a Gardner phase transition between a "normal glass" and a "marginally stable glass", we investigate the off-equilibrium dynamics of three-dimensional polydisperse hard spheres, used as a model for colloidal or granular glasses. Deep inside the glass phase, we find that a sharp crossover pressure PG separates two distinct dynamical regimes. For pressure P < P-G, the glass behaves as a normal solid, displaying fast dynamics that quickly equilibrate within the glass free energy basin. For P > P-G, instead, the dynamics become strongly anomalous, displaying very large equilibration timescales, aging, and a constantly increasing dynamical susceptibility. The crossover at P-G is strongly reminiscent of the one observed in three-dimensional spin-glasses in an external field, suggesting that the two systems could be in the same universality class, consistent with theoretical expectations. eng open access Spin-glass-like aging in colloidal and granular glasses journal article