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Generation of vortices and observation of Quantum Turbulence in an oscillating Bose-Einstein Condensate

We report on the experimental observation of vortex formation and production of tangled vortex distribution in an atomic BEC of Rb-87 atoms submitted to an external oscillatory perturbation. The oscillatory perturbations start by exciting quadrupolar and scissors modes of the condensate. Then regular vortices are observed finally evolving to a vortex tangle configuration. The vortex tangle is a signature of the presence of a turbulent regime in the cloud. We also show that this turbulent cloud has suppression of the aspect ratio inversion typically observed in quantum degenerate bosonic gases during free expansion.

preprint2009arXivOpen access
E. A. L. HennJ. A. SemanG. RoatiK. M. F. MagalhaesV. S. Bagnato
cond-mat.quant-gas
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E. A. L. HennJ. A. SemanG. RoatiK. M. F. MagalhaesV. S. Bagnato

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