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SUMMARY:Ising spin model for directional decision-making on the move - Pro
 f. Nir Gov\, Weizmann Institute 
DTSTART:20241114T130000Z
DTEND:20241114T140000Z
UID:TALK224569@talks.cam.ac.uk
CONTACT:Raymond E. Goldstein
DESCRIPTION:How do animals make decisions on where to go? How do animal gr
 oups make such collective decisions? We present a spin-based model for how
  animal groups and single animals make navigational decisions on their dir
 ection and speed. The model describes motion that is diffusive in the diso
 rdered phase\, and run-and-tumble in the ordered phase. The model predicts
  a series of trajectories and a hierarchy of bifurcations in the presence 
 of multiple identical targets. The geometry of these bifurcations is affec
 ted by the angular dependence of the interactions between the spins that r
 epresent the different targets. These predictions are compared to observat
 ions in different animal species. This model presents a new approach to de
 cision-making in animals on the move\, and as a new class of deciding-acti
 ve matter.
LOCATION:MR14\,  Centre for Mathematical Sciences\, Wilberforce Road\, Cam
 bridge
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