Spatial Clustering of Depinning Avalanches in Presence of Long-Range Interactions – Archive ouverte HAL

Clément Le PriolPierre Le Doussal 1 Alberto Rosso 2

Clément Le Priol, Pierre Le Doussal, Alberto Rosso. Spatial Clustering of Depinning Avalanches in Presence of Long-Range Interactions. Physical Review Letters, American Physical Society, 2021, 126 (2), ⟨10.1103/PhysRevLett.126.025702⟩. ⟨hal-03117974⟩

Disordered elastic interfaces display avalanche dynamics at the depinning transition. For short-range interactions, avalanches correspond to compact reorganizations of the interface well described by the depinning theory. For long-range elasticity, an avalanche is a collection of spatially disconnected clusters. In this paper we determine the scaling properties of the clusters and relate them to the roughness exponent of the interface. The key observation of our analysis is the identification of a Bienaym{\'e}-Galton-Watson process describing the statistics of the cluster number. Our work has a concrete importance for experimental applications where the cluster statistics is a key probe of avalanche dynamics.

  • 1. LPENS (UMR_8023) - Laboratoire de physique de l'ENS - ENS Paris
  • 2. LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques