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Multistable Free States of an Active Particle from a Coherent Memory Dynamics.
V Bacot1,2,3, S Perrard4, M Labousse5
1Matière et Systèmes Complexes, CNRS UMR 7057, Université Paris Diderot, Sorbonne Paris Cité, 75013 Paris, France.
Physical Review Letters
|April 2, 2019
Summary
Self-propelled particles with memory exhibit stable states and oscillations. This study explores the dynamics of a bouncing drop on a vibrated liquid, revealing complex behaviors driven by its emitted waves.
Area of Science:
- Physics of complex systems
- Fluid dynamics
- Nonlinear dynamics
Background:
- Self-propelled particles are fundamental to understanding active matter.
- Coherent memory in physical systems can lead to emergent behaviors.
- Bouncing drops on vibrated liquids offer a unique platform for studying wave-particle interactions.
Purpose of the Study:
- To investigate the dynamics of a self-propelled particle with coherent memory.
- To explore the transitory regime and phase space of this system.
- To reveal the existence of stable free states and oscillatory regimes.
Main Methods:
- Experimental investigation of a bouncing drop on a vibrated liquid.
- Numerical simulations to model particle dynamics and wave interference.
- Phase space exploration to identify different dynamic regimes.
Main Results:
- The self-propelled particle exhibits multiple stable free states.
- A self-sustained oscillatory regime was discovered.
- Velocity modulations arise during the buildup of dynamics.
Conclusions:
- Coherent memory and wave-mediated propulsion lead to complex dynamics.
- The system's nonlocality and wave nature contribute to the coexistence of multiple states.
- This research provides insights into memory effects in active matter systems.
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