Scientific Results

Self-similar Expansion of the Density Profile in a Turbulent Bose-Einstein Condensate

Year: 2012

Authors: Caracanhas M., Fetter AL., Muniz SR., Magalhaes KMF., Roati G., Bagnato G., Bagnato V.S.

Autors Affiliation: Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil; Stanford Univ, Dept Phys, GLAM, Stanford, CA 94305 USA; Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA; Univ Firenze, INO CNR, I-50019 Sesto Fiorentino, Italy; Univ Firenze, LENS, I-50019 Sesto Fiorentino, Italy

Abstract: In a recent study we demonstrated the emergence of turbulence in a trapped Bose-Einstein condensate of Rb-87 atoms. An intriguing observation in such a system is the behavior of the turbulent cloud during free expansion. The aspect ratio of the cloud size does not change in the way one would expect for an ordinary non-rotating (vortex-free) condensate. Here we show that the anomalous expansion can be understood, at least qualitatively, in terms of the presence of vorticity distributed throughout the cloud, effectively counteracting the usual reversal of the aspect ratio seen in free time-of-flight expansion of non-rotating condensates.

Journal/Review: JOURNAL OF LOW TEMPERATURE PHYSICS

Volume: 166 (1-2)      Pages from: 49  to: 58

More Information: SPRINGER/PLENUM PUBLISHERS, 233 SPRING ST, NEW YORK, NY 10013 USA
DOI: 10.1007/s10909-011-0409-2
KeyWords: Atomic quantum fluid; Condensate expansion; Vortices; urbulence; QUANTUM TURBULENCE
DOI: 10.1007/s10909-011-0409-2

Citations: 8
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