Bose-Einstein condensation with magnetic dipole-dipole forces

Details Bose-Einstein condensation with magnetic dipole-dipole forces Bose-Einstein condensation with magnetic dipole-dipole forces

1999-07-20

arxiv.org/abs/cond-mat/9907308v2

Phys. Rev. A 61, 051601 (2000)

Physics

Condensed Matter

final version, 4 pages, 4 figures

Scientific paper

10.1103/PhysRevA.61.051601

Ground-state solutions in a dilute gas interacting via contact and magnetic dipole-dipole forces are investigated. To the best of our knowledge, it is the first example of studies of the Bose-Einstein condensation in a system with realistic long-range interactions. We find that for the magnetic moment of e.g. chromium and a typical value of the scattering length all solutions are stable and only differ in size from condensates without long-range interactions. By lowering the value of the scattering length we find a region of unstable solutions. In the neighborhood of this region the ground state wavefunctions show internal structures not seen before in condensates. Finally, we find an analytic estimate for the characteristic length appearing in these solutions.

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