Few-body physics of ultracold atoms and molecules with long-range   interactions
  The quantum mechanical few-body problem at ultracold energies poses severe challenges to theoretical techniques, particularly when long-range interactions are present that decay only as a power-law potential. In this paper we review the techniques and progress in studies of universal few-body physics for ultracold atoms, particularly those related to long-range interactions. 
Yujun Wang and P. S. Julienne and Chris H. Greene
physics.atom-ph cond-mat.quant-gas