Preparation and detection of a mechanical resonator near the ground state of motion

2009/07/19 by T. Rocheleau, Tristan O. Rocheleau, Tchefor Ndukum +9 · 5 citations
Engineering · Physics and Astronomy · #Acoustic Wave Resonator Technologies #Acoustics #Advanced MEMS and NEMS Technologies #Atomic physics #Classical mechanics #Computer science #Geology #Ground motion #Ground state #Materials science #Mechanical and Optical Resonators #Motion (physics) #Optoelectronics #Physics #Resonator #Seismology #State (computer science) #quant-ph

paper · pdf · doi:10.1038/nature08681

arxiv created 2009/07/19 · openalex publication_date 2009/12/09 · arxiv updated 2015/05/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We have cooled the motion of a radio-frequency nanomechanical resonator by parametric coupling to a driven microwave frequency superconducting resonator. Starting from a thermal occupation of 480 quanta, we have observed occupation factors as low as 3.8±1.2 and expect the mechanical resonator to be found with probability 0.21 in the quantum ground state of motion. Cooling is limited by random excitation of the microwave resonator and heating of the dissipative mechanical bath.

Citations

• Electromechanical Noise in a Diffusive Conductor
• Feedback Cooling of a Cantilever’s Fundamental Mode below 5 mK

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