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SUMMARY:Anomalous diffusion and rigorous renormalization group
DTSTART:20250331T140000Z
DTEND:20250331T150000Z
DTSTAMP:20260610T125400Z
UID:indico-event-13557@indico.math.cnrs.fr
DESCRIPTION:Speakers: Scott Armstrong\n\nMany problems in mathematical phy
 sics involve disorder across many length scales\, which is often addressed
  heuristically using renormalization group arguments. Particularly challen
 ging are ``infrared'' renormalizations\, in which small-scale disorder nee
 ds to be ``integrated out'' to reveal the macroscopic behavior of the syst
 em. In many interesting models\, this procedure must be iterated a large (
 or even infinite) number many times. Finding a way to do this rigorously i
 s a big challenge\, and it has been the focus of my research for the last 
 several years. In this talk I will try to explain some of the interesting 
 open problems and the ``coarse-graining theory'' we have been developing f
 or attacking them. A particular application I will discuss is the analysis
  of stochastic processes exhibiting anomalous diffusion (in which the vari
 ance of the particle at time $t$ is not linear in $t$). \n \n\nhttps://i
 ndico.math.cnrs.fr/event/13557/
LOCATION:Fokko du Cloux (Braconnier)
URL:https://indico.math.cnrs.fr/event/13557/
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