@article{1765,
  author = {D. Bortolotti and Shai Ronen and John Bohn and D. Blume},
  title = {Scattering Length Instability in Dipolar Bose-Einstein Condensates},
  abstract = {We predict a new kind of instability in a Bose-Einstein condensate composed of dipolar particles. Namely, a comparatively weak dipole moment can produce a large, negative two-body scattering length that can collapse the Bose-Einstein condensate. To verify this effect, we validate mean-field solutions to this problem using exact, diffusion Monte Carlo methods. We show that the diffusion Monte Carlo energies are reproduced accurately within a mean-field framework if the variation of the 
s
-wave scattering length with the dipole strength is accounted for properly.},
  year = {2006},
  journal = {Physical Review Letters},
  volume = {97},
  pages = {160402},
  month = {2006-10},
  issn = {0031-9007},
  doi = {10.1103/PhysRevLett.97.160402},
}