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UID:0-893@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20230919T110000
DTEND;TZID=Europe/Paris:20230919T120000
DTSTAMP:20230906T161636Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-ruben-zakine-polytechnique/
SUMMARY:Séminaire du LPTMS : Ruben Zakine (Ecole Polytechnique) - Salle de
 s séminaires du FAST et du LPTMS\, bâtiment Pascal n°530 - 19 Sep 23 11
 :00
DESCRIPTION:Socioeconomic agents as active matter and nucleation paths in a
 ctive field theories\n&nbsp\;\nRuben Zakine (Ecole Polytechnique)\n&nbsp\;
 \n\n\nIn this seminar\, we will tackle two subjects whose common thread is
  active matter.\nIn a first part\, I will focus on a socio-economic occupa
 tion model in the spirit of the Sakoda-Schelling model\, historically intr
 oduced to shed light on segregation dynamics among human groups. For a lar
 ge class of utility functions and decision rules that drive the system out
  of equilibrium\, we recover an equilibrium-like phase separation phenomen
 ology. Within the mean-field approximation I will show how the model can b
 e mapped\, to some extent\, onto an active matter field description\, pavi
 ng the way for a unifying framework which considers population and price d
 ynamics within a field theoretic approach.\nIn a second part\, using the n
 ucleation-induced active phase separation as a starting observation\, I wi
 ll ask a general question: How can one predict the final phase of a nonequ
 ilibrium system where several phases compete? Since resorting to the free 
 energy minimization is impossible\, the transition depends crucially on th
 e system’s dynamics. By using a minimum action method\, we will pinpoint
  the first-order phase transition in some spatially-extended nonequilibriu
 m systems\, including the Active Model B\, the natural nonequilibrium exte
 nsion of the Cahn-Hilliard dynamics. The paths of the transitions and thei
 r critical nuclei are notably identified\n\nhttps://universite-paris-sacla
 y-fr.zoom.us/j/92254477857?pwd=MDRXYVcrQW9oSjFlbElWV3I1UW1HQT09\n\nMeeting
  ID: 922 5447 7857\nPasscode: 700442\n\n\n
CATEGORIES:seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
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