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

Phononic crystals (PnCs) are capable of manipulating the flow of elastic energy through
their periodic structures and have emerged as a promising field in the last two decades …

Precisely engineered mechanical oscillators keep time, filter signals and sense motion,
making them an indispensable part of the technological landscape of today. These unique …

Efficient interconversion of both classical and quantum information between microwave and
optical frequency is an important engineering challenge. The optomechanical approach with …

Conversion between signals in the microwave and optical domains is of great interest both
for classical telecommunication and for connecting future superconducting quantum …

The energy damping time in a mechanical resonator is critical to many precision metrology
applications, such as timekeeping and force measurements. We present measurements of …

We resolve phonon number states in the spectrum of a superconducting qubit coupled to a
multimode acoustic cavity. Crucial to this resolution is the sharp frequency dependence in …

Optomechanical systems offer new opportunities in quantum information processing and
quantum sensing. Many solid-state quantum devices operate at millikelvin temperatures …

The addition of active, nonlinear, and nonreciprocal functionalities to passive piezoelectric
acoustic wave technologies could enable all-acoustic and therefore ultra-compact …

Nuclear spins interact weakly with their environment and therefore exhibit long coherence
times. This has led to their use as memory qubits in quantum information platforms, where …