Symbiotic Solitons in Heteronuclear Multicomponent Bose-Einstein   condensates
  We show that bright solitons exist in quasi-one dimensional heteronuclear multicomponent Bose-Einstein condensates with repulsive self-interaction and attractive inter-species interaction. They are remarkably robust to perturbations of initial data and collisions and can be generated by the mechanism of modulational instability. Some possibilities for control and the behavior of the system in three dimensions are also discussed. 
Victor M. Perez-Garcia and Juan Belmonte