Nonlinear Dynamics of Ultra-Cold Gas: Collapse of Bose Gas With   Attractive Interaction
  Solutions for the Nonlinear Schrodinger equation for collapsing Bose gas with attraction. This is a copy of the paper published in 1992 in Proceedings of NATO Advanced Research workshop on Singularities in Fluids, Plasmas and Optics (Heraklion, Greece) edited by R.E. Caflisch and G.C. Papanicolaou (Kluwer Academic). 
V. V. Flambaum, E. Kuznetsov
cond-mat.quant-gas physics.atom-ph quant-ph