Excitable patterns in active nematics.

@article{Giomi2011ExcitablePI,
  title={Excitable patterns in active nematics.},
  author={L Giomi and L. Mahadevan and Bishwanath Chakraborty and Michael F. Hagan},
  journal={Physical review letters},
  year={2011},
  volume={106 21},
  pages={
          218101
        }
}
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… CONTINUE READING

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