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SUMMARY:Universality for Self-organized Criticality - Christopher Hoffman 
 (University of Washington)
DTSTART:20240918T130000Z
DTEND:20240918T140000Z
UID:TALK220609@talks.cam.ac.uk
DESCRIPTION:One of the most cited physics papers of the 1980s was Bak\, Ta
 ng and Wiesenfeld's introduction of self-organized criticality. This theor
 y said that diverse physical systems such as earthquakes\, forest fires an
 d avalanches are all governed by similar underlying dynamics and thus they
  share certain fundamental behaviors. They also proposed a mathematical mo
 del that should have all of the properties that define self-organized crit
 icality. Such a model would be called a universal model for self-organized
  criticality. Abelian networks are a class of models that contain several 
 good candidates for a universal model\, including activated random walk an
 d the stochastic sandpile model. We will discuss recent results about thes
 e models which give some progress to finding a universal model for self-or
 ganized criticality.\n&nbsp\;\nThis is joint work with Toby Johnson and Ma
 tt Junge
LOCATION:Seminar Room 1\, Newton Institute
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