Wave packet dynamics of the matter wave field of a Bose-Einstein   condensate
  We show in the framework of a tractable model that revivals and fractional revivals of wave packets afford clear signatures of the extent of departure from coherence and from Poisson statistics of the matter wave field in a Bose-Einstein condensate, or of a suitably chosen initial state of the radiation field propagating in a Kerr-like medium. 
C. Sudheesh, S. Lakshmibala, and V. Balakrishnan (IIT Madras)