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UID:0-1157@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20261001T110000
DTEND;TZID=Europe/Paris:20261001T120000
DTSTAMP:20260921T095917Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/lptms-seminar-cnr
 s-michalis-chatzittofi-university-of-cambridge/
SUMMARY:LPTMS Seminar: Michalis Chatzittofi - Salle des séminaires du FAST
  et du LPTMS\, bâtiment Pascal n°530 - 1 Oct 26 11:00
DESCRIPTION:Nonequilibrium nucleation theory for nonconserved fields: from 
 active matter to population dynamics\nMichalis Chatzittofi (University of 
 Cambridge - CNRS applicant)\n&nbsp\;\n\nClassical nucleation theory (CNT) 
 describes the formation of a stable phase from a metastable one. In equili
 brium systems\, it quantifies the free-energy competition between a favora
 ble bulk gain and an unfavorable interfacial cost. For systems without det
 ailed balance\, the corresponding nonequilibrium nucleation theory (NNT) w
 as so far developed only for cases with a conserved order parameter\, such
  as active fluid-fluid phase separation. Here we construct the NNT for sys
 tems with a (single\, scalar) nonconserved order parameter. Unlike in the 
 conserved case\, the nucleation barrier controlling (noise-driven) droplet
  growth is profoundly altered by deviations in the interfacial density pro
 file from the one arising during (deterministic) droplet relaxation. The b
 arrier can nonetheless be analysed by carefully defining the reaction coor
 dinate (droplet radius) to project out those deviations. We give explicit 
 NNT predictions for models drawn from population dynamics and active matte
 r\, finding excellent agreement with numerical studies.\n\n&nbsp\;
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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DTSTART:20260329T030000
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