  A feasible experimental proposal to realize a non-dispersive quantum pendulum
is presented. The proposed setup consists of an ultracold atomic cloud,
featuring attractive interatomic interactions, loaded into a tilted ring
potential. The classical and quantum domains are switched on by tuned
interactions, and the classical dynamical stabilization of unstable states,
i.e. {\it a la} Kapitza, is shown to be driven by quantum phase imprinting. The
potential use of this system as a gravimeter is discussed.
