Pilot-wave dynamics in a circular corral

The trajectory of a droplet walking in a circular corral, color coded according to speed. Note the correlation between position and speed, which results in the wavelike statistics.

The probability distribution of a droplet walking in a circular corral, which is well described by the corral's Faraday wave mode.


Bouncing droplets can self-propel laterally along the surface of a vibrated fluid bath by virtue of a resonant interaction with their own wave field. The resulting walking droplets exhibit features reminiscent of microscopic quantum particles. Here we present the results of an experimental investigation of droplets walking in a circular corral. We demonstrate that a coherent wavelike statistical behavior emerges from the complex underlying dynamics and that the probability distribution is prescribed by the Faraday wave mode of the corral. The statistical behavior of the walking droplets is demonstrated to be analogous to that of electrons in quantum corrals.

See papers: Harris, Moukhtar, Fort, Couder and Bush (2013) ,  Harris & Bush (2013)

Select Press:  MIT News  , Tracinski Letter