Dynamic splitting of a Bose-Einstein Condensate

Details Dynamic splitting of a Bose-Einstein Condensate Dynamic splitting of a Bose-Einstein Condensate

2000-05-18

arxiv.org/abs/cond-mat/0005302v1

Physics

Condensed Matter

17 pages, 8 figures

Scientific paper

10.1103/PhysRevA.63.023601

We study the dynamic process of splitting a condensate by raising a potential barrier in the center of a harmonic trap. We use a two-mode model to describe the phase coherence between the two halves of the condensate. Furthermore, we explicitly consider the spatial dependence of the mode funtions, which varies depending on the potential barrier. This allows to get the tunneling coupling between the two wells and the on-site energy as a function of the barrier height. Moreover we can get some insight on the collective modes which are excited by raising the barrier. We describe the internal and external degrees of freedom by variational ansatz. We distinguish the possible regimes as a function of the characteristic parameters of the problem and identify the adiabaticity conditions.

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