  Polyoxometalate single ion magnet [GdW$_{30}$P$_5$O$_{110}$]$^{12-}$ has been
studied by generalized Rabi oscillation experiments. It was possible to
increase the number of coherent rotations tenfold through matching the Rabi
frequency with the frequency of the proton. Achieving high coherence with
polyoxometalate chemistry, we show their excellent potential not only for the
storage of quantum information but even for the realization of quantum
algorithms.
