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arXiv · 2210.11767

The invariant measure of a walking droplet in hydrodynamic pilot-wave theory

Hung D. Nguyen·Anand U. Oza
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Abstract

We study the long time statistics of a walker in a hydrodynamic pilot-wave system, which is a stochastic Langevin dynamics with an external potential and memory kernel. While prior experiments and numerical simulations have indicated that the system may reach a statistically steady state, its long-time behavior has not been studied rigorously. For a broad class of external potentials and pilot-wave forces, we construct the solutions as a dynamics evolving on suitable path spaces. Then, under the assumption that the pilot-wave force is dominated by the potential, we demonstrate that the walker possesses a unique statistical steady state. We conclude by presenting an example of such an invariant measure, as obtained from a numerical simulation of a walker in a harmonic potential.

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Hung D. Nguyen, Anand U. Oza. 2022-10-21. The invariant measure of a walking droplet in hydrodynamic pilot-wave theory. https://doi.org/10.1088/1361-6544/ad5f6f

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