Manipulating the momentum state of a condensate by sequences of standing-wave pulses

School of Electronics Engineering & Computer Science, Peking University, Beijing 100871, China(Dated: April 14, 2011)We analyze the effects of sequences of standing wave pulses on a Bose-Einstein condensate (BEC).Experimental observations are in good agreement with a numerical simulation based on the bandstructure theory in the optical lattice. We also demonstrate that a coherent control method basedon such sequences of pulses is very efficient for experimentally designing specific momentum states.