| A fundamental characteristic of condensed Bose systems is their response to rotation. Although Bose condensation can occur for a non-interacting Bose gas, the formation of arrays of quantised vortices in a rotating gas relies on non-vanishing (repulsive) interparticle interactions. In typical ultra-cold atomic Bose condensates, the interactions are so short-ranged that they can be viewed as local (contact) interactions. However, significant additional interactions can arise if the atoms have intrinsic or induced electric or magnetic dipole moments. I shall discuss the effects of dipolar interactions on the properties of the vortex lattices in a weakly-interacting atomic Bose gas. |
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