Scientists cooled a nanoparticle to the quantum limit
The particle’s motion reached the lowest level allowed by the Heisenberg uncertainty principle

Scientists cooled a nanoparticle in a specially designed cavity (shown), reaching the lowest temperature permitted by quantum mechanics. Laser light scattering off of the nanoparticle appears as a dot in the center of this artificially colored image.
Kahan Dare, Lorenzo Magrini and Yuriy Coroli/University of Vienna