Non-coaxial vortices in two-component Bose-Einstein condensates: Persistent precession and nutation

R. Driben; V. V. Konotop; T. Meier

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arXiv · 1505.04113

Non-coaxial vortices in two-component Bose-Einstein condensates: Persistent precession and nutation

R. Driben·V. V. Konotop·T. Meier

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Abstract

It is demonstrated that a two-component Bose-Einstein condensate (BEC) with all-repulsive inter-atomic interactions loaded into a radially symmetric harmonic trap supports robust non-coaxial vortices with approximately orthogonal vortex lines in each of the components. These cross vortices are excited from the linear modes by a sudden switch-on of the nonlinearity (via Feshbach resonance) and are characterized by persistent dynamical regimes of precession with nutation, resembling the motion of a rigid body. The obtained dynamics can be understood qualitatively on the basis of a simple mechanical model.

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R. Driben, V. V. Konotop, T. Meier. 2015-05-15. Non-coaxial vortices in two-component Bose-Einstein condensates: Persistent precession and nutation. https://arxiv.org/abs/1505.04113

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