Controlled Creation of Spatial Superposition States for Single Atoms
  We present a method for the controlled and robust generation of spatial superposition states of single atoms in micro-traps. Using a counter-intuitive positioning sequence for the individual potentials and appropriately chosen trapping frequencies, we show that it is possible to selectively create two different orthogonal superposition states, which can in turn be used for quantum information purposes. 
K. Deasy, Th. Busch, Y. Niu, S. Gong, S. Jin and S. Nic Chormaic