  We propose an efficient optical electromagnetically induced transparency
(EIT) cooling scheme for a cantilever with a nitrogen-vacancy center attached
in a non-uniform magnetic field using dynamical Zeeman effect. In our scheme,
the Zeeman effect combined with the quantum interference effect enhances the
desired cooling transition and suppresses the undesired heating transitions. As
a result, the cantilever can be cooled down to nearly the vibrational ground
state under realistic experimental conditions within a short time. This
efficient optical EIT cooling scheme can be reduced to the typical EIT cooling
scheme under special conditions.
