title: Passive cooling of a micromechanical oscillator with a resonant electric circuit.
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.
authors.affiliation: Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA. krbrown@boulder.nist.gov
authors.forename: K R
authors.initials: KR
authors.lastname: Brown
authors.forename: J
authors.initials: J
authors.lastname: Britton
authors.forename: R J
authors.initials: RJ
authors.lastname: Epstein
authors.forename: J
authors.initials: J
authors.lastname: Chiaverini
authors.forename: D
authors.initials: D
authors.lastname: Leibfried
authors.forename: D J
authors.initials: DJ
authors.lastname: Wineland