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Ordering spontaneous flows and aging in active fluids depositing tracks.

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Active systems leave environmental footprints that alter their collective behavior. This study develops a theory showing how these dynamic footprints modify transitions and aging in active matter, revealing new dynamical phases.

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Area of Science:

  • Physics
  • Biophysics
  • Soft Matter Physics

Background:

  • Cell monolayers and active matter create persistent environmental perturbations, termed footprints.
  • These footprints dynamically influence the system's overall behavior and dynamics.

Purpose of the Study:

  • To develop a theoretical framework for active fields interacting with non-advected footprint fields.
  • To derive general hydrodynamics for polar and nematic active fields coupled to footprints.

Main Methods:

  • Theoretical modeling of active fields.
  • Derivation of general hydrodynamics for polar and nematic systems.
  • Analysis of dynamic coupling effects.

Main Results:

  • Dynamic coupling to footprints introduces novel effects absent in classical active hydrodynamics.
  • Symmetry-dependent modifications to the isotropic-ordered transition.
  • Alterations in spontaneous flow transitions and initial condition-dependent aging dynamics.

Conclusions:

  • Footprint deposition is a crucial mechanism governing the dynamical phases of active systems.
  • This framework explains long-lived transient states and unique dynamic behaviors in cellular and active matter.
  • The study highlights the importance of environmental interactions in active matter physics.