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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Emergence of Turbulence in an Oscillating Bose-Einstein Condensate

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Author(s):
Henn, E. A. L. [1] ; Seman, J. A. [1] ; Roati, G. [2, 3] ; Magalhaes, K. M. F. [1] ; Bagnato, V. S. [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[2] CNR, INFM, I-50019 Sesto Fiorentino - Italy
[3] Univ Florence, LENS & Dipartimento Fis, I-50019 Sesto Fiorentino - Italy
Total Affiliations: 3
Document type: Journal article
Source: Physical Review Letters; v. 103, n. 4, p. 045301-1-045301-4, July 2009.
Field of knowledge: Physical Sciences and Mathematics - Physics
Web of Science Citations: 174
Abstract

We report on the experimental observation of vortex tangles in an atomic Bose-Einstein condensate (BEC) of 87Rb 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. (AU)

FAPESP's process: 08/57858-9 - National Institute for Optics and Photonics
Grantee:Vanderlei Salvador Bagnato
Support type: Research Projects - Thematic Grants