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UID:865a9dbe6e4df1172907ff2c8c39b90d
CATEGORIES:Mathematical Physics Seminar
CREATED:20210927T120117
SUMMARY:Renormalization and disorder : a simple toy model
LOCATION:zoom
DESCRIPTION:<p>After a short review of our understanding of how&nbsp;&nbsp; a weak diso
 rder or&nbsp;a low density of impurities affect the universality class of a
  phase&nbsp;transition,&nbsp; &nbsp;I will discuss a simple tree-like toy m
 odel for which one can prove&nbsp;that,&nbsp; due to&nbsp; &nbsp;disorder, 
 the depinning transition becomes&nbsp; an infinite order&nbsp; transition o
 f the Berezinski-Kosterlitz-Thouless type.&nbsp;&nbsp; This toy&nbsp;model 
 was introduced&nbsp; to understand the depinning transition of a line&nbsp;
 from a random substrate,&nbsp; one of the simplest problems in the theory o
 f disordered systems.&nbsp; &nbsp;This depinning transition&nbsp; has a lon
 g history among physicists and&nbsp;mathematicians.&nbsp; &nbsp;Still&nbsp;
  the nature of the transition, one of the central questions of&nbsp;the pro
 blem, remains&nbsp; unsolved.</p>
CONTACT:Bernard Derrida - Ecole Normale Supérieure de Paris
DTSTAMP:20260828T230834
DTSTART;TZID=America/New_York:20211006T104500
DTEND;TZID=America/New_York:20211006T114500
SEQUENCE:0
TRANSP:OPAQUE
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