Bloch oscillations: atom optical interpretation, realizations, and   applications
  The cyclic motion of particles in a periodic potential under the influence of a constant external force is analyzed in an atom optical approach based on Landau-Zener transitions between two resonant states. The resulting complex picture of population transfers can be interpreted in an intuitive diagrammatic way. The model is also applied to genuine atom optical systems and its applicability is discussed. 
Karl-Peter Marzlin and Juergen Audretsch