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Emergent Hyperuniformity in Periodically Driven Emulsions.

Joost H Weijs1, Raphaël Jeanneret2, Rémi Dreyfus3

  • 1Laboratoire de Physique de l'École Normale Supérieure de Lyon, Université de Lyon, 46, allée d'Italie, 69007 Lyon, France.

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Summary
This summary is machine-generated.

Microfluidic emulsions self-organize into hyperuniform structures when periodically driven, transitioning from reversible to irreversible dynamics. This suggests a robust link between reversibility and hyperuniformity in driven materials.

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Area of Science:

  • Physics, Soft Matter
  • Materials Science
  • Fluid Dynamics

Background:

  • Microfluidic emulsions exhibit complex self-organization behaviors.
  • Understanding transitions in driven soft matter is crucial for materials design.

Purpose of the Study:

  • To investigate the self-organization of microfluidic emulsions under periodic driving.
  • To identify the mechanisms leading to anomalously homogeneous structures.
  • To explore the relationship between dynamics and emergent structures.

Main Methods:

  • Periodic driving of confined microfluidic emulsions.
  • Analysis of dynamical transitions (reversible to irreversible).
  • Characterization of structural changes across multiple scales.
  • Numerical simulations to identify key factors suppressing density fluctuations.

Main Results:

  • Observed a first-order dynamical transition from reversible to irreversible dynamics.
  • Identified the formation of macroscopic, finite hyperuniform structures.
  • Demonstrated that long-range hydrodynamic interactions are not essential for hyperuniformity in this driven system.
  • Discovered that the suppression of density fluctuations is linked to the dynamical transition.

Conclusions:

  • Periodic driving induces a transition to hyperuniformity in microfluidic emulsions.
  • Hyperuniformity can emerge without long-range hydrodynamic interactions, unlike in equilibrium systems.
  • A robust relationship exists between reversibility and hyperuniformity in periodically driven materials.