  Under resonant conditions, a long sequence of landau-zener transitions can
lead to Rabi oscillations. Using a nitrogen-vacancy (NV) center spin in
diamond, we investigated the interference between more than 100 Landau-Zener
processes. We observed the new type of Rabi oscillations of the electron spin
resulting from the interference between successive Landau-Zener processes in
various regimes, including both slow and fast passages. The combination of the
control techniques and the favorable coherent properties of NV centers provides
an excellent experimental platform to study a variety of quantum dynamical
phenomena.
