Bosons with attractive interactions in a trap: Is the ground state   fragmented ?
  Possible fragmentation of a Bose-Einstein condensate with negative scattering length is investigated using a simple two-level model. Our results indicate that fragmentation does not take place for values of the coupling for which the system is metastable. We also comment on the possibility of realizing a fragmented condensate in trapping potentials other than an harmonic one. 
Oe. Elgaroey (Dept. of Physics, University of Oslo) and C. J. Pethick   (Nordita, Copenhagen)