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SUMMARY:Patterns in Polarisable Elastic Active Layers - Pismen\, L (Techni
 on - Israel Institute of Technology)
DTSTART:20150825T100000Z
DTEND:20150825T110000Z
UID:TALK60446@talks.cam.ac.uk
CONTACT:42080
DESCRIPTION:I explore a class of macroscopic continuous models with feedba
 ck interactions inducing spontaneous vector or nematic polarisation and me
 chanical deformation of elastic active media. Linear stabilityanalysis pre
 dicts\, depending on the sign of feedback interaction\ncoefficients\, eith
 er monotonic or oscillatory instability of the homogeneous isotropic state
 . In the former case\, the emerging pattern undergoes a slow coarsening pr
 ocess but permanent polarity may emerge when the system is topologically c
 onstrained. Oscillatory\ninstabilities arise in active systems on a finite
  wavelength\, and lead to complex wave patterns. Transition to a deformed 
 polarised state may be frustrated in constrained geometry but leads to bou
 ndary undulations in free-boundary settings.\n\n
LOCATION:Seminar Room 2\, Newton Institute Gatehouse
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