Bose-Einstein condensation with magnetic dipole-dipole forces

Since the advent of Bose-Einstein condensation in dilute gases of alkali metals @1# and hydrogen @2#, it has become apparent that the interactions between the condensed atoms govern most of the observed phenomena. In all the experiments so far the interaction can be described by a contact potential that is characterized by the scalar quantity a being the s-wave scattering length. Static properties like the condensate’s ground-state density profile, its instability in the case of negative a, and the mean-field shift in spectroscopic measurements as well as dynamic properties like collective excitations and propagation of sound have been investigated