Emergence of Turbulence in an Oscillating Bose-Einstein Condensate

Year: 2009

Authors: Henn A., Seman J., Roati G., Magalhaes K., Bagnato V.

Autors Affiliation: Instituto de Fısica de Sao Carlos, Universidade de Sao Paulo, Caixa Postal 369, 13560-970 Sa˜o Carlos, SP, Brazil; LENS and Dipartimento di Fisica, Universita di Firenze, and INFM-CNR, Via Nello Carrara 1, 50019 Sesto Fiorentino, Italy

Abstract: We report on the experimental observation of vortex tangles in an atomic Bose-Einstein condensate (BEC) of (87)Rb atoms when an external oscillatory perturbation is introduced in the trap. The vortex tangle configuration is a signature of the presence of a turbulent regime in the cloud. We also show that this turbulent cloud suppresses the aspect ratio inversion typically observed in quantum degenerate bosonic gases during free expansion. Instead, the cloud expands keeping the ratio between their axis constant. Turbulence in atomic superfluids may constitute an alternative system to investigate decay mechanisms as well as to test fundamental theoretical aspects in this field.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 103 (4)      Pages from: 045301  to: 045301

More Information: Experiments to observe QT in Bose-Einstein condensates (BEC) are being carried out also at NIST, in the group of K. Helmerson [ 38]. We acknowledge helpful suggestions from J. Dalibard, M. Modugno, W. Phillips, and C. Salomon and technical support of R. F. Shiozaki. This work was supported by FAPESP, CNPq, and CAPES.
DOI: 10.1103/PhysRevLett.103.045301

Citations: 218
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