Abstract
We report experiments in which the vibrations of a micromechanical
oscillator are coupled to the motion of Bose-condensed atoms in a trap.
The interaction relies on surface forces experienced by the atoms at
about one micrometer distance from the mechanical structure. We observe
resonant coupling to several well-resolved mechanical modes of the
condensate. Coupling via surface forces does not require magnets,
electrodes, or mirrors on the oscillator and could thus be employed to
couple atoms to molecular-scale oscillators such as carbon nanotubes.
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