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SUMMARY:Metachronal coordination in cilia carpets - Benjamin Friedrich\, T
 U Dresden
DTSTART:20211116T130000Z
DTEND:20211116T140000Z
UID:TALK163921@talks.cam.ac.uk
CONTACT:Camille Scalliet
DESCRIPTION:Motile cilia are hair-like extensions of biological cells that
  beat periodically like a whip. Collections of cilia on the surface of mic
 roorganisms or human airways beat in a coordinated fashion as a traveling 
 wave -- similar to a Mexican wave in a soccer stadium -- to facilitate eff
 icient fluid transport. \n\nThis emblematic example of synchronization of 
 noisy biological oscillators attracted attention from physicists and mathe
 maticians alike\, yet some important questions remain open: How does the s
 hape of the cilia beat determine the direction of metachronal waves? And w
 hat is the impact of active fluctuations? \n\nUsing a multi-scale modeling
  framework based on a measured cilia beat pattern\, we predict that many w
 aves are linearly stable to small perturbations\, but a single dexioplecti
 c wave has predominant basin-of-attraction. Similar to a "dynamic'' Mermin
 -Wagner theorem\, relaxation times diverge with system size\, which rules 
 out global order in infinite systems\; instead\, we observe local synchron
 ization in the presence of active noise\, providing an intriguing link to 
 the statistical physics of the celebrated Kuramoto model.
LOCATION:Center for Mathematical Sciences\, Lecture room MR11\, or https:/
 /maths-cam-ac-uk.zoom.us/j/98016675669
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