BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:MechE Colloquium: Seeking a unifying description from the glass tr
 ansition to creep flows
DTSTART:20240326T120000
DTEND:20240326T130000
DTSTAMP:20260414T211932Z
UID:f675c9d97c7be2934059ae5e3fe8caeb66fadc7528a082ab1ac20ddd
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof Matthieu Wyart\, EPFL SB IPHYS PCSL \nAbstract: \n\nUnd
 er cooling\, a supercooled liquid undergoes a glass transition and stops f
 lowing. Physicists do not agree on the microscopic reasons that make a gla
 ss solid. Some view this phenomenon as being collective in nature: it may 
 be a signature of a thermodynamic phase transition\, or  being caused by 
 kinetic constraints (where particles seek to solve a sort of Chinese puzzl
 e). Others view it as simply reflecting elementary barriers for rearrangem
 ents\, controlled by the elasticity of the material. Here I will introduce
  a novel algorithm to systematically extract elementary rearrangements in 
 a broad energy range. It allows us to verify a quantitative prediction on 
 the relaxation time\, assuming that relaxation is not collective in nature
 . I will also propose a  theory of dynamical correlations in liquids base
 d on coupled local rearrangements\,  which connects this phenomenon  to 
 avalanche-type responses observed in driven disordered materials. I will d
 iscuss connections between this view and recent measurement of sound emiss
 ion in the creep response of  crumpled papers. \n\n\nBiography: \n\nMat
 thieu Wyart  is a French physicist. He is professor of physics at EPFL (
 École Polytechnique Fédérale de Lausanne) and the head of the Physics o
 f Complex Systems Laboratory. Wyart’s research encompassed field such as
  the architecture of allosteric materials\, the theory of deep learning\, 
 the elasticity and mechanical stability in disordered solids\, the granula
 r and suspension flows\, the glass and rigidity transitions\, the marginal
  stability at random close packing and other glasses\, and the yielding tr
 ansition. Wyart is the recipient of the Simons Investigator Award\, the Sl
 oan Fellowship\, the G. Carrier Fellowship and is a fellow of the American
  Physical Society.\n\n 
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418 https://epf
 l.zoom.us/j/61626448592
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR