Laser cooling of a Planck mass object close to the quantum ground state

Leonhard Neuhaus, Remi Metzdorff, Salim Zerkani +13

Quantum mechanics has so far not been tested for mechanical objects at the scale of the Planck mass $\sqrt{\hslash c/G}\simeq 22\mu \mathrm{g}$. We present an experiment where a 1 m…