Particle motion could be assessed from the directional sensory hair cells, and sound pressure from the vibration of an air-bubble structure, such as the swim bladder of a fish.

a, A schematic diagram of the experimental set-up.In the experiment, the bottom of the container was moved towards the optically trapped particle, using the z-axis control of the three-stage piezo ...

As this quantum particle moved, it was observed to scatter off the gas particles and to reflect backwards. This led to an oscillatory motion, in contrast to what a marble would do when falling in ...