Bak-Tang-Wiesenfeld 1987 abelian sandpile: self-organised criticality

Bak-Tang-Wiesenfeld 1987 (Phys. Rev. Lett. 59:381) introduced the *self-organised criticality* (SOC) concept: a slowly driven, locally-conservative system with a threshold instability spontaneously relaxes to a scale-invariant state with…