Effects of Axial Vorticity in Elongated Mixtures of Bose-Einstein Condensates

Details Effects of Axial Vorticity in Elongated Mixtures of Bose-Einstein Condensates Effects of Axial Vorticity in Elongated Mixtures of Bose-Einstein Condensates

2008-06-02

arxiv.org/abs/0806.0262v1

Phys. Rev. A 77, 035601 (2008)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevA.77.035601

We consider a meniscus between rotating and nonrotating species in the Bose-Einstein condensate (BEC) with repulsive inter-atomic interactions, confined to a pipe-shaped trap. In this setting, we derive a system of coupled one-dimensional (1D) nonpolynomial Schrodinger equations (NPSEs) for two mean-field wave functions. Using these equations, we analyze the phase separation/mixing in the pipe with periodic axial boundary conditions, i.e. in a toroidal configuration. We find that the onset of the mixing, in the form of suction, i.e., filling the empty core in the vortical component by its nonrotating counterpart, crucially depends on the vorticity of the first component, and on the strengths of the inter-atomic interactions.

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