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SUMMARY:Wetting transition of active Brownian particles - Nigel Wilding\, 
 University of Bristol
DTSTART:20221101T130000Z
DTEND:20221101T140000Z
UID:TALK178868@talks.cam.ac.uk
CONTACT:Camille Scalliet
DESCRIPTION:This talk describes recent simulation studies of a wetting tra
 nsition in a minimal model of active matter.  To set the scene and establi
 sh terminology\, we begin by reviewing how surface phase transitions manif
 est in assembles of passive (ie equilibrium) particles at an attractive im
 penetrable substrate. We then address the case of a system of active Brown
 ian particles in contact with a purely repulsive potential barrier that mi
 mics a thin permeable membrane.  Under conditions of bulk motility-induced
  phase separation\, the interaction strength ε of the barrier controls th
 e affinity of the dense phase for the barrier region. We uncover clear sig
 natures of a wetting phase transition as ε is varied.  In common with its
  equilibrium counterpart\, the character of this transition depends on the
  system dimensionality: a continuous transition with enhanced density fluc
 tuations and gas bubbles is uncovered in 2d while 3d systems exhibit a sha
 rp transition absent of large correlations.
LOCATION:Center for Mathematical Sciences\, Lecture room MR4
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