2025/10/06 by Klamser, Juliane U., Berthier, Ludovic
#Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #Statistical Mechanics (cond-mat.stat-mech)
paper · doi:10.48550/arxiv.2510.04575
We numerically study the collective dynamics of dense particle assemblies driven by non-reciprocal pairwise forces of amplitude κ. At a critical value κ\rm c, the system undergoes a dynamical phase transition from an absorbing state (κ< κ\rm c) to a chaotic steady state (κ> κ\rm c). The chaotic phase is marked by nontrivial spatiotemporal velocity correlations and mixing, reminiscent of active turbulence in self-propelled systems. The sharp onset of chaos shows critical scaling consistent with the universality class of directed percolation. We argue that this transition is generic to a broad class of locally-driven, dense disordered materials.