Excitable Patterns in Active Nematics

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Excitable Patterns in Active Nematics

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Title: Excitable Patterns in Active Nematics
Author: Giomi, Luca; Mahadevan, Lakshminarayanan; Chakraborty, Bulbul; Hagan, Michael

Note: Order does not necessarily reflect citation order of authors.

Citation: Giomi, Luca, Lakshminarayanan Mahadevan, Bulbul Chakraborty, and Michael F. Hagan. 2011. Excitable Patterns in Active Nematics. Physical Review Letters 106(21): 218101.
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Abstract: We analyze a model of mutually propelled filaments suspended in a two-dimensional solvent. The system undergoes a mean-field isotropic-nematic transition for large enough filament concentrations, and the nematic order parameter is allowed to vary in space and time. We show that the interplay between nonuniform nematic order, activity, and flow results in spatially modulated relaxation oscillations, similar to those seen in excitable media. In this regime the dynamics consists of nearly stationary periods separated by ‘‘bursts’’ of activity in which the system is elastically distorted and solvent is pumped throughout. At even higher activity, the dynamics becomes chaotic.
Published Version: doi:10.1103/PhysRevLett.106.218101
Other Sources: http://www.seas.harvard.edu/softmat/downloads/2011-08.pdf
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:5128482
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