Formation of dynamical Schr\"odinger cats in low-dimensional ultracold   attractive Bose gases
  Dynamical Schr\"odinger cats can be formed when a one-dimensional attractive Bose-gas cloud is scattered off a potential barrier. Once formed, these objects are stable in time. The phenomenon and its mechanism -- transformation of kinetic energy to internal energy of the scattered atomic cloud -- are obtained by solving the time-dependent many-boson Schr\"odinger equation. Implications are discussed. 
Alexej I. Streltsov, Ofir E. Alon, and Lorenz S. Cederbaum