Feedback Cooling of All External Degrees of Freedom of a Levitated Nanoparticle for Exploring Macroscopic Quantum Mechanics

Controlling the motion of macroscopic mechanical oscillators with extreme precision in the quantum regime is a central challenge in modern physics. In this context, optically levitated nanoparticles offer a promising platform because they are well isolated from environmental noise and can be released into free space, enabling free expansion of their wave function.Recent experiments have achieved g...