From Collective Motion to Collective Actuation in Populations of Polar Active Units

by Olivier Dauchot,

Gulliver UMR CNRS 7083, ESPCI Paris, Université PSL,

75005 Paris, France

 

Summary:

• Introduction:
  • Different types of active matter: from biology to artificial systems.
  • New macroscopic physics, specific to active matter.
• Dilute systems:
  • Mechanical pressure is not a state variable.
• Fluids:
  • Motility Induced Phase Separation (if time).
  • Collective Motion.
• Dense phases:
  • Towards crystallization.
  • A flowing crystal-
• Elastic solids:
  • Collective actuation.
• Conclusion and Perspectives.