Abstract
The behavior of physics objects on the microscopic scale is dominated by their wave/particle duality. This fundamental characteristic, perfectly described in the quantum framework, is often considered to have no equivalent in classical physics. This seminar was devoted to the possibility of introducing a macroscopic-scale system where a particle and a wave are dynamically associated. A droplet bouncing off a vibrating liquid bath can become self-propelled by its coupling to the surface waves it generates. The result is the formation of a composite entity consisting of the droplet and its associated wave. An iterative exchange of information takes place between these two components of the system: the drop generates the wave, and the wave determines where the drop will go. Waves have a long lifetime, so the overall wave field contains a memory of the previous trajectory. In the presence of this "path memory", various forms of wave-particle duality can be observed, despite the classical nature of this system.
