Generic phase diagram of active polar films

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...

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Bibliographic Details
Published in:Physical review letters 2006-01, Vol.96 (2), p.028102-028102, Article 028102
Main Authors: Voituriez, R, Joanny, J F, Prost, J
Format: Article
Language:English
Subjects:
Actins - chemistry
Actomyosin - chemistry
Bacteria
Gels
Kinesin - chemistry
Microtubules - chemistry
Models, Biological
Physics
Solutions
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Summary: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 actomyosin gels, microtubules and kinesins in vitro solutions, or swimming bacterial colonies.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.96.028102