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Event Detail Information

CANCELLED - ICMT Seminar: "Stochastic Recruitment Leads to Symmetry-Breaking"

Speaker

Dr. Tommaso Biancalani, University of Illinois Urbana-Champaign

Date Feb 17, 2014
Time 12:00 pm  
Location NEW LOCATION: 280 MRL, 104 S. Goodwin
Sponsor Department of Physics
Contact Stephanie Johansson
Phone 217-300-4241
Event type ICMT Seminar
Views 22
When an ant colony is faced with two identical equidistant food sources, the foraging ants are found to concentrate more on one source than the other. Analogous symmetry-breaking behaviours have been reported in various population systems, (such as queueing or stock market trading) suggesting the existence of a simple universal mechanism. Past studies have neglected the effect of demographic noise and required rather complicated models to qualitatively reproduce this behaviour. I will show how including the effects of demographic noise leads to a radically different conclusion. The symmetry-breaking arises solely due to the process of recruitment and ceases to occur for large population sizes. The latter fact provides a testable prediction for a real system.
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