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Passive odd viscoelasticity.

Ruben Lier1,2, Jay Armas3,4, Stefano Bo1

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Summary
This summary is machine-generated.

Odd elasticity, a unique response in viscoelastic materials, is now found in passive chiral fluids, not just active systems. This study models passive odd viscoelasticity, revealing its distinct hydrodynamic behavior.

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Area of Science:

  • Rheology
  • Condensed Matter Physics
  • Materials Science

Background:

  • Active chiral materials exhibit odd elasticity, a response perpendicular to applied stress.
  • Understanding the origins and scope of odd elasticity is crucial for materials science.
  • Previous research focused primarily on active systems for odd elastic phenomena.

Purpose of the Study:

  • To investigate the presence of odd elasticity in passive chiral viscoelastic fluids.
  • To develop a theoretical model for passive odd viscoelasticity.
  • To analyze the hydrodynamic behavior associated with odd elasticity.

Main Methods:

  • Utilized a covariant formulation of viscoelasticity.
  • Employed entropy production analysis.
  • Derived dispersion relations for hydrodynamic modes using a chiral extension of the Jeffreys model.

Main Results:

  • Demonstrated that odd elasticity exists in passive chiral viscoelastic fluids, not exclusively in active systems.
  • Showed that linear viscoelastic chiral solids require activity to exhibit odd elastic responses.
  • Obtained clear imprints of odd viscoelastic behavior in hydrodynamic modes.

Conclusions:

  • Odd elasticity is a broader phenomenon than previously understood, extending to passive chiral fluids.
  • The proposed chiral Jeffreys model effectively captures passive odd viscoelasticity.
  • The covariant formalism provides a powerful tool for analyzing chiral viscoelasticity and its unique responses.