Regensburg 2025 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 27: Poster: Nonlinear Dynamics, Pattern Formation, Granular Matter

DY 27.13: Poster

Wednesday, March 19, 2025, 15:00–18:00, P4

Athermal jamming as a Manna class transition with a deterministic protocol — •Thomas Axmann, Mishael Derla, and Michael Schmiedeberg — Theoretical Physics: Lab for Emergent Phenomena, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany

Athermal jamming can be understood as the transition point of an overlap reducing dynamical protocol of soft particles, where the absorbing (non-overlapping) states become inaccessible during configuration space sampling when increasing the density above the transition. The properties of this transition appear to be of d+1 conserved directed percolation (Manna) universality, largely independent of the details of the dynamics implemented. To demonstrate this, we present a fully deterministic protocol that remains in the Manna class. The study was conducted numerically, but we further endeavor to illuminate the situation analytically, by exploring possibilities for relating athermal jamming to directed percolation in time. We aim to determine the transition density for systems with Random Organization and Jamming and conditions to be in the Manna class.

(Note: Thomas Axmann and Mishael Derla contributed equally and will present the poster together)

Keywords: Jamming Transition; Dynamical Phase Transition; Conserved Directed Percolation; Non-Equilibrium Phase Transition; Random Organization