Comment on "Bose-Einstein condensation with magnetic dipole-dipole forces"

Abstract

The ground state solutions of a dilute Bose condensate with contact and magnetic dipole-dipole interactions are examined. By lowering the value of the scattering length, Goral et al. [cond-mat/9907308 and Phys. Rev. A {\bf 61}, 051601 (2000)] numerically predict a region of unstable solutions, accompanied by a neighborhood where the ground-state wave functions have internal structure. On the contrary, we find that the dipolar condensate has an intuitively-located stability region, and ground-state solutions near the instability threshold which are absent any unusual structure.