R. W. Pattinson, T. P. Billam, S. A. Gardiner, D. J. McCarron, H. W. Cho, S. L. Cornish, N. G. Parker, N. P. Proukakis
In a recent experiment [D. J. McCarron et al., Phys. Rev. A 84, 011603(R) (2011)] a two--species Rb-87 - Cs-133 Bose-Einstein condensate was formed and three distinct regimes of density distributions observed depending on relative atom numbers of the two species. To investigate these theoretically, we obtain time-independent solutions of the trapped two-species condensate through zero-temperature mean-field simulations. We find the results to be sensitive to experimentally relevant shifts in the potentials in both longitudinal and transverse directions, and observe a range of structures, including `ball and shell' formations and axially/radially separated states. We find good overall agreement with the experimental results for all regimes.
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http://arxiv.org/abs/1209.2603
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