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SUMMARY:Polar Fluctuations Lead to Extensile Nematic Behaviour in Confluen
 t Tissues - Chiu Fan Lee (Imperial College London)
DTSTART:20230822T090000Z
DTEND:20230822T100000Z
UID:TALK204238@talks.cam.ac.uk
DESCRIPTION:How can a collection of motile cells\, each generating contrac
 tile nematic stresses in isolation\, become an extensile nematic at the ti
 ssue level? Understanding this seemingly contradictory experimental observ
 ation\, which occurs irrespective of whether the tissue is in the liquid o
 r solid states\, is not only crucial to our understanding of diverse biolo
 gical processes\, but is also of fundamental interest to soft matter and m
 any-body physics. In this talk\, I will discuss how to resolve this cellul
 ar to tissue level disconnect in the small fluctuation regime by using ana
 lytical theories based on hydrodynamic descriptions of confluent tissues\,
  in both liquid and solid states. Specifically\, I will provide analytical
  and numerical evidence that &nbsp\;a collection of microscopic constituen
 ts with no inherently nematic extensile forces can exhibit active extensil
 e nematic behaviour when subject to polar fluctuating forces.
LOCATION:Seminar Room 2\, Newton Institute
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