David Grass

TL;DR: A quantum interface that combines optical trapping of solids with cavity-mediated light-matter interaction and laser-cooling an optically trapped nanoparticle into its quantum ground state of motion from room temperature is demonstrated.

TL;DR: A demonstration of such controlled interactions by cavity cooling the center-of-mass motion of an optically trapped submicron particle paves the way for a light–matter interface that can enable room-temperature quantum experiments with mesoscopic mechanical systems.

TL;DR: A simple method was developed for evaluating the efficacy of face masks to reduce respiratory droplet emission during speaking and observed that some mask types approach the performance of standard surgical masks, while some mask alternatives, such as neck gaiters or bandanas, offer very little protection.

TL;DR: In this article, the authors used coherent scattering into an optical cavity to cool the center of mass motion of a $143$ nm diameter silica particle by more than $7$ orders of magnitude to $n_x=0.43\pm0.03$ phonons along the cavity axis, corresponding to a temperature of $12~\mu$K.

TL;DR: By achieving nanometer-level control over the particle location, this work optimize the position-dependent coupling and demonstrate axial cooling by two orders of magnitude at background pressures of 6×10^{-2} mbar.