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SUMMARY:Barrier crossing and rare fluctuations of active particles - Peter
  Sollich (University of Göttingen)
DTSTART:20260303T130000Z
DTEND:20260303T140000Z
UID:TALK243427@talks.cam.ac.uk
CONTACT:Balázs Németh
DESCRIPTION:We study barrier crossing processes for active particles. Usin
 g a low-noise Kramers limit we derive the effective activation barriers fo
 r three standard descriptions: active Brownian (ABP)\, active Ornstein-Uhl
 enbeck (AOUP) and run-and-tumble particles. We find that\, because barrier
  crossing is dominated by rare fluctuations\, there are significant qualit
 ative differences between these. For ABPs one key result is that\, for pot
 entials with a symmetry axis\, activity can generate optimal escape paths 
 that break this symmetry. Time permitting\, extensions to barrier crossing
  in configuration space\, i.e. cage breaking in active glasses\, will be d
 iscussed with a focus on AOUPs.
LOCATION:Center for Mathematical Sciences\, Lecture room MR4.
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