Laser Induced Condensation of Trapped Bosonic Gases
  We demonstrate that an appropriate sequence of laser pulses allows to condense a gas of trapped bosonic atoms into an arbitrary trap level.   Such condensation is robust, can be achieved in experimentally feasible traps, and may lead to multistability and hysteresis phenomena. 
L. Santos, M. Lewenstein, J. I. Cirac and Y. Castin