Optomechanics is concerned with the use of light to control mechanical objects. As a field, it
has been hugely successful in the production of precise and novel sensors, the …

The traditional view from particle physics is that quantum-gravity effects should become
detectable only at extremely high energies and small length scales. Owing to the significant …

Quantum control of complex objects in the regime of large size and mass provides
opportunities for sensing applications and tests of fundamental physics. The realization of …

We report on rotating an optically trapped silica nanoparticle in vacuum by transferring spin
angular momentum of light to the particle's mechanical angular momentum. At sufficiently …

Roger Penrose proposed that a spatial quantum superposition collapses as a back-reaction
from spacetime, which is curved in different ways by each branch of the superposition. In this …

We describe a variety of searches for new physics beyond the standard model of particle
physics which may be enabled in the coming years by the use of optically levitated masses …

We demonstrate optical levitation of SiO 2 spheres with masses ranging from 0.1 to 30 ng. In
high vacuum, we observe that the measured acceleration sensitivity improves for larger …

No experiment to date has provided evidence for quantum features of the gravitational
interaction. Recently proposed tests suggest looking for the generation of quantum …

We implement a cold-dam** scheme to cool one mode of the center-of-mass motion of an
optically levitated nanoparticle in ultrahigh vacuum (10-8 mbar) from room temperature to a …

Levitated optomechanics is showing potential for precise force measurements. Here, we
report a case study to show experimentally the capacity of such a force sensor, using an …