Self-organized criticality in boson clouds around black holes
arXiv:1203.4681 · doi:10.1103/PhysRevD.85.105022
Abstract
Boson clouds around black holes exhibit interesting physical phenomena through the Penrose process of superradiance, leading to black hole spin-down. Axionic clouds are of particular interest, since the axion Compton wavelength could be comparable to the Schwarzschild radius, leading to the formation of "gravitational atoms" with a black hole nucleus. These clouds collapse under certain conditions, leading to a "Bosenova". We model the dynamics of such unstable boson clouds by a simple cellular automaton and show that it exhibits self-organized criticality. Our results suggest that the evolution through the black hole Regge plane is due to self-organized criticality.
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- Self Organized Criticality in an one dimensional magnetized grid. Application to GRB X-ray afterglows