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Tunable bimodal explorations of space from memory-driven deterministic dynamics
Authors
Y. Couder
Maxime Hubert
+3 more
M. Labousse
S. Perrard
Nicolas Vandewalle
Publication date
1 January 2019
Publisher
'American Physical Society (APS)'
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on
arXiv
Abstract
We present a wave-memory-driven system that exhibits intermittent switching between two propulsion modes in free space. The model is based on a pointlike particle emitting periodically cylindrical standing waves. Submitted to a force related to the local wave-field gradient, the particle is propelled, while the wave field stores positional information on the particle trajectory. For long memory, the linear motion is unstable and we observe erratic switches between two propulsive modes: linear motion and diffusive motion. We show that the bimodal propulsion and the stochastic aspect of the dynamics at long time are generated by a Shil'nikov chaos. The memory of the system controls the fraction of time spent in each phase. The resulting bimodal dynamics shows analogies with intermittent search strategies usually observed in living systems of much higher complexity. © 2019 American Physical Society
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