Someone argues: "The Bak-Tang-Wiesenfeld sandpile proves that criticality can arise…
PHYSICS · Subjective · Fermi University Physics · Thermal, Statistical & Complex Systems · Complex and collective systems · Complex and collective systems
Many Parts, One Behaviour, Ch Self-organised criticality and avalanches
Problem
Someone argues: "The Bak-Tang-Wiesenfeld sandpile proves that criticality can arise with no tuning of any kind. Unlike site percolation, where the occupation probability must be set exactly to pc=0.5927 by hand, the sandpile finds its own critical point through its dynamics alone, with no parameter that anyone has to adjust." Find the error in this argument.