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Tailoring the interactions between self-propelled bodies.

Jean-Baptiste Caussin1, Denis Bartolo

  • 1Laboratoire de Physique de l'École Normale Supérieure de Lyon, Université de Lyon, 69007, Lyon, France, jeanbaptiste.caussin@ens-lyon.fr.

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Summary
This summary is machine-generated.

We classify interactions between self-propelled particles using symmetry. This framework unifies existing models and suggests new active matter phases by categorizing interactions into potential, inelastic, and non-reciprocal types.

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Area of Science:

  • Physics
  • Soft Matter Physics
  • Statistical Mechanics

Background:

  • Self-propelled particles exhibit complex behaviors.
  • Understanding inter-particle interactions is crucial for active matter.
  • Existing models lack a unified classification framework.

Purpose of the Study:

  • To systematically classify interactions between self-propelled particles.
  • To develop a unified framework for modeling active matter systems.
  • To identify novel interactions for creating new active matter phases.

Main Methods:

  • Symmetry considerations applied to particle interactions.
  • Systematic expansion of two-body forces (multipolar expansion).
  • Categorization into potential, inelastic, and non-reciprocal interactions.

Main Results:

  • A unified framework rationalizing existing models.
  • Classification into three distinct physical interaction types.
  • Design rules for modeling and fabricating interacting self-propelled bodies.

Conclusions:

  • The proposed framework simplifies the study of active matter.
  • New classes of interactions can lead to novel active matter phases.
  • Facilitates the design and fabrication of active systems.