Experimental creation and analysis of displaced number states
  We create displaced number states, which are nonclassical generalizations of coherent states, of a vibrational mode of a single trapped ion. 
F. Ziesel, T. Ruster, A. Walther, H. Kaufmann, K. Singer, F.   Schmidt-Kaler and U. G. Poschinger
quant-ph physics.atom-ph