Passive Cooling of a Micromechanical Oscillator with a Resonant Electric Circuit
arXiv:0705.1197 · doi:10.1103/PhysRevLett.99.137205
Abstract
We cool the fundamental mode of a miniature cantilever by capacitively coupling it to a driven rf resonant circuit. Cooling results from the rf capacitive force, which is phase shifted relative to the cantilever motion. We demonstrate the technique by cooling a 7 kHz cantilever from room temperature to 45 K, obtaining reasonable agreement with a model for the cooling, damping, and frequency shift. Extending the method to higher frequencies in a cryogenic system could enable ground state cooling and may prove simpler than related optical experiments in a low temperature apparatus.
arXiv comment4 pages, 4 figures; minor changes to match published version
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