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Phase-synchronized state of oriented active fluids.

Sebastian Fürthauer1, Sriram Ramaswamy1

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Summary
This summary is machine-generated.

We developed a theory for self-driven fluids, considering active particles with periodic cycles. This leads to synchronized particle phases and unique flow instabilities in ordered active fluids.

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Area of Science:

  • Physics
  • Biophysics
  • Soft Matter Physics

Background:

  • Active matter systems, like cytoskeletal extracts and microbial suspensions, exhibit complex behaviors driven by internal energy sources.
  • Understanding the collective dynamics of these self-driven fluids is crucial for biological processes and material science.

Purpose of the Study:

  • To present a theoretical framework for self-driven fluids incorporating the periodic duty cycle of active particles.
  • To investigate the transition to synchronized states and resulting flow instabilities in orientationally ordered active fluids.

Main Methods:

  • Development of a theoretical model for active fluids with phase-coherent particles.
  • Analysis of phase synchronization transitions and their impact on fluid dynamics.
  • Comparison with existing models for phase-incoherent active matter.

Main Results:

  • An orientationally ordered active fluid can transition to a state of synchronized particle phases.
  • This synchronization breaks time-translation invariance, leading to novel flow instabilities.
  • The predicted instabilities differ from those observed in phase-incoherent active matter.

Conclusions:

  • The periodic duty cycle of active particles is a key factor in emergent collective behavior.
  • Spontaneous phase synchronization can drive distinct flow instabilities in active fluids.
  • The theory provides insights into fluid transport in biological systems and predicts phenomena in concentrated active suspensions and colloidal arrays.