Radio-frequency communication systems have long used bulk-and surface-acoustic-wave
devices supporting ultrasonic mechanical waves to manipulate and sense signals. These …

We consider the use of quantum-limited mechanical force sensors to detect ultralight (sub-
meV) dark matter (DM) candidates which are weakly coupled to the standard model. We …

The only coupling dark matter is guaranteed to have with the standard model is through
gravity. Here we propose a concept for direct dark matter detection using only this …

We revisit quantum state preparation of an oscillator by continuous linear position
measurement. Quite general analytical expressions are derived for the conditioned state of …

We provide a fully analytical treatment for the partial refrigeration of the thermal motion of a
quantum mechanical resonator under the action of feedback. As opposed to standard cavity …

We consider an optomechanical cavity that is driven stroboscopically by a train of short
pulses. By suitably choosing the interpulse spacing we show that ground-state cooling and …

Optical-to-mechanical quantum state transfer is an important capability for future quantum
networks, quantum communication, and distributed quantum sensing. However, existing …

Preparing macroscopic mechanical resonators close to their motional quantum groundstate
and generating entanglement with light offers great opportunities in studying fundamental …

Achieving fast cooling of motional modes is a prerequisite for leveraging such bosonic
quanta for high-speed quantum information processing. In this Letter, we address the aspect …

The quantum measurement of any observable naturally leads to noise added by the act of
measurement. Approaches to evade or reduce this noise can lead to substantial …