  Magnetic resonance in an ensemble of laser-cooled trapped Rb atoms is excited
using a micro- cantilever with a magnetic tip. The cantilever is mounted on a
multi-layer chip designed to capture, cool, and magnetically transport cold
atoms. The coupling is observed by measuring the loss from a magnetic trap as
the oscillating cantilever induces Zeeman state transitions in the atoms.
Interfacing cold atoms with mechanical devices could enable probing and
manipulating atomic spins with nanometer spatial resolution and single-spin
sensitivity, leading to new capabilities in quantum computation, quantum
simulation, or precision sensing.
