Generation of Vortices and Observation of Quantum Turbulence in an Oscillating Bose-Einstein Condensate

被引：0
|
作者：
E. A. L. Henn
J. A. Seman
G. Roati
K. M. F. Magalhães
V. S. Bagnato
机构：
[1] Universidade de São Paulo,Instituto de Física de São Carlos
[2] Universita di Firenze,LENS and Dipartimento di Fisica
[3] and INFM-CNR,undefined
来源：
Journal of Low Temperature Physics | 2010年 / 158卷
关键词：
Vortices; Quantum turbulence; Bose-Einstein condensation; 03.75.Lm; 03.75.Kk; 47.37.+q; 47.27.Cn;
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学科分类号：
摘要：
We report on the experimental observation of vortex formation and production of tangled vortex distribution in an atomic BEC of 87Rb 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.
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页码：435 / 442
页数：7
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