Stabilization of BEC droplet in free space by feedback control of   interatomic interaction
  A self-trapped Bose-Einstein condensate in three-dimensional free space is shown to be stabilized by feedback control of the interatomic interaction through nondestructive measurement of the condensate's peak column density. The stability is found to be robust against poor resolution and experimental errors in the measurement. 
Hiroki Saito and Masahito Ueda