A Quantum Bouncing Ball
By Julio Gea-Banaloche ; University of Arkansas; cataloged for NSDL by the ComPADRE Pathway

From the resource web page:
[…] The red dot in the picture shows the corresponding motion for a classical object. The number at the top of the picture is the number of classical bounces. You may notice that the quantum motion is not periodic and that after a while it becomes seemingly random (if it’s stopped, view the animation on the resource site). However, after about twenty classical bounces the wavepacket seems to collect itself and starts to bounce fairly regularly again, only it is a half-cycle out of phase with the classical "ball." […]