Generic phase diagram of active polar films

Abstract

We study theoretically the phase diagram of compressible active polar gels such as the actin network of eukaryotic cells. Using generalized hydrodynamics equations, we perform a linear stability analysis of the uniform states in the case of an infinite bidimensional active gel to obtain the dynamic phase diagram of active polar films. We predict in particular modulated flowing phases, and a macroscopic phase separation at high activity. This qualitatively accounts for experimental observations of various active systems, such as acto-myosin gels, microtubules and kinesins in vitro solutions, or swimming bacterial colonies.

4 pages, 1 figure

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Cited by in corpus (54)

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• Colloids in active fluids: Anomalous micro-rheology and negative drag
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• Thin-Film Modelling of Resting and Moving Active Droplets
• Casting Polymer Nets to Optimize Noisy Molecular Codes
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• Active viscoelastic nematics with partial degree of order