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Equilibrium solutions for immiscible two-species Bose-Einstein condensates in perturbed harmonic traps.

Pattinson, R. W. and Billam, T. P. and Gardiner, S. A. and McCarron, D. J. and Cho, H. W. and Cornish, S. L. and Parker, N. G. and Proukakis, N. P. (2013) 'Equilibrium solutions for immiscible two-species Bose-Einstein condensates in perturbed harmonic traps.', Physical review A., 87 (1). 013625.


We investigate the mean-field equilibrium solutions for a two-species immiscible Bose-Einstein condensate confined by a harmonic confinement with additional linear perturbations. We observe a range of equilibrium density structures, including ball and shell formations and axially or radially separated states, with a marked sensitivity to the potential perturbations and the relative atom number in each species. Incorporation of linear trap perturbations, albeit weak, are found to be essential to match the range of equilibrium density profiles observed in a recent 87Rb-133Cs Bose-Einstein condensate experiment [McCarron et al., Phys. Rev. A 84 011603(R) (2011)]. Our analysis of this experiment demonstrates that sensitivity to linear trap perturbations is likely to be an important factor in interpreting the results of similar experiments in the future.

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Publisher statement:Reprinted with permission from the American Physical Society: R. W. Pattinson, T. P. Billam, S. A. Gardiner, D. J. McCarron, H. W. Cho, S. L. Cornish, N. G. Parker, and N. P. Proukakis, Physical Review A, 87, 013625, 2013. © 2013 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:No date available
Date deposited:26 June 2014
Date of first online publication:January 2013
Date first made open access:No date available

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