Multistable Free States of an Active Particle from a Coherent Memory Dynamics
Multistable Free States of an Active Particle from a Coherent Memory Dynamics
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DOI：
10.1103/physrevlett.122.104303
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发表时间：
2019-03-14
影响因子：
8.6
通讯作者：
Fort, E.
中科院分区：
文献类型：
--
作者：
Bacot, V;Perrard, S.;Fort, E.
我们研究了具有相干记忆的确定性自推进粒子的动力学。我们的实验和数值证据表明，它具有几个稳定的自由状态。该系统由一个在振动液体上弹跳的自推进液滴组成，液滴在每次弹跳时发出的波驱动下弹跳。该物体具有推进记忆，这是由沿其路径沿着积累的波的相干干涉引起的。我们在这里研究导致速度调制的动态积累的过渡状态。实验和数值模拟使我们能够探索相空间的未知领域，并揭示了一个自我维持的振荡制度的存在。最后，我们展示了几个自由状态的共存。这一特点出现在时空非局部性的路径记忆动力学以及波的性质的驱动机制。
We investigate the dynamics of a deterministic self-propelled particle endowed with coherent memory. We evidence experimentally and numerically that it exhibits several stable free states. The system is composed of a self-propelled drop bouncing on a vibrated liquid driven by the waves it emits at each bounce. This object possesses a propulsion memory resulting from the coherent interference of the waves accumulated along its path. We investigate here the transitory regime of the buildup of the dynamics which leads to velocity modulations. Experiments and numerical simulations enable us to explore unchartered areas of the phase space and reveal the existence of a self-sustained oscillatory regime. Finally, we show the coexistence of several free states. This feature emerges both from the spatiotemporal nonlocality of this path memory dynamics as well as the wave nature of the driving mechanism.