SKM 2023 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 27: Glasses and Glass Transition I (joint session DY/CPP)

CPP 27.1: Talk

Tuesday, March 28, 2023, 14:00–14:15, ZEU 148

Dynamical phase transitions in trap models and universality classes of aging — •Diego Tapias¹ and Peter Sollich^{1, 2} — ¹Institute for Theoretical Physics, University of Göttingen, Germany — ²Department of Mathematics, King's College London, London, UK

We investigate how aging and driving by trajectory biasing interact in two mean field models of glassy dynamics, widely known as trap models. We show that similarly to kinetically constrained models, the equilibrium state of the unbiased system above the glass transition temperature is located at the coexistence of two dynamical phases (active and inactive). In contrast, below this temperature, we find two different nonequilibrium scenarios: energetic (or activated) aging that is destroyed by any dynamical bias towards low activity, which we call ``fragile aging", and entropic aging that is stable against the existence of such a dynamical bias, which we refer to as ``robust aging". We conjecture that these categories have broader relevance as universality classes for aging dynamics in glassy systems.