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Localized spatiotemporal dynamics in active fluids.

Luca Barberi1, Karsten Kruse1

  • 1Department of Biochemistry, <a href="https://ror.org/01swzsf04">University of Geneva</a>, 1211 Geneva, Switzerland and Department of Theoretical Physics, <a href="https://ror.org/01swzsf04">University of Geneva</a>, 1211 Geneva, Switzerland.

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Summary
This summary is machine-generated.

Active materials, like cytoskeletal networks, exhibit complex dynamics. This study reveals that localized patterns in contractile mechanochemical systems can display oscillations and chaotic behaviors, driven by coupled mechanics and chemistry.

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Area of Science:

  • Biophysics
  • Soft Matter Physics
  • Systems Biology

Background:

  • Many biological systems, from cytoskeletal networks to tissues, function as active materials.
  • Active materials are influenced by chemical reaction networks affecting their composition and stress generation.
  • The interplay between mechanics and chemistry in these systems drives self-organization, such as pattern formation.

Purpose of the Study:

  • To investigate the intrinsic spatiotemporal dynamics of localized patterns in contractile mechanochemical systems.
  • To characterize phenomena beyond simple pattern formation, including oscillations and chaotic-like dynamics.
  • To elucidate the physical origins and bifurcation structure underlying these complex dynamics.

Main Methods:

  • Theoretical modeling of contractile mechanochemical systems.
  • Analysis of pattern formation and stability.
  • Bifurcation analysis to identify dynamic regimes.

Main Results:

  • Contractile mechanochemical systems spontaneously form localized spatial patterns.
  • These patterns exhibit rich intrinsic spatiotemporal dynamics, including oscillations and chaotic-like behavior.
  • The study identifies the physical mechanisms and bifurcation pathways governing these dynamics.

Conclusions:

  • Localized patterns in active materials are not static but can possess complex internal dynamics.
  • The coupling of mechanics and chemistry is crucial for generating diverse spatiotemporal behaviors in biological systems.
  • Understanding these dynamics provides insights into self-organization and pattern formation in living matter.