Phonon Coupling between a Nanomechanical Resonator and a Quantum Fluid

Quantum entanglement between a nonlinear nanomechanical resonator and a microwave field.

We consider a theoretical model for a nonlinear nanomechanical resonator coupled to a superconducting microwave resonator. The nanomechanical resonator is driven parametrically at twice its resonance frequency, while the superconducting microwave resonator is driven with two tones that differ in frequency by an amount equal to the parametric driving frequency. We show that the semiclassical app...

Linear and nonlinear coupling between transverse modes of a nanomechanical resonator

Nanomechanical vibrating wire resonator for phonon spectroscopy in liquid helium

We demonstrate how to machine a vibrating wire resonator for ultrasonic excitations in gaseous and liquid helium. This novel resonator is designed as a nanoscopic mechanically flexible bridge machined out of a semiconductor/metal hybrid. Quenching of the mechanical resonance around 100 MHz in gaseous and liquid 4He at 4.2 K is shown. Vibrating wire resonators (VWRs) are standard bolometers for ...

Approaching the quantum limit of a nanomechanical resonator.

By coupling a single-electron transistor to a high-quality factor, 19.7-megahertz nanomechanical resonator, we demonstrate position detection approaching that set by the Heisenberg uncertainty principle limit. At millikelvin temperatures, position resolution a factor of 4.3 above the quantum limit is achieved and demonstrates the near-ideal performance of the single-electron transistor as a lin...

Classical to quantum transition of a driven nonlinear nanomechanical resonator

Much experimental effort is invested these days in fabricating nanoelectromechanical systems (NEMS) that are sufficiently small, cold and clean, so as to approach quantum mechanical behavior as their typical quantum energy scale h̄ becomes comparable with that of the ambient thermal energy kBT . Such systems will hopefully enable one to observe the quantum behavior of human-made objects, and te...