de-Broglie Wave-Front Engineering
  We propose a simple method for the deterministic generation of an arbitrary continuous quantum state of the center-of-mass of an atom. The method's spatial resolution gradually increases with the interaction time with no apparent fundamental limitations. Such de-Broglie Wave-Front Engineering of the atomic density can find applications in Atom Lithography, and we discuss possible implementations of our scheme in atomic beam experiments. 
M. Olshanii, N. Dekker, C. Herzog, and M. Prentiss (Harvard   University)