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Journal of Low Temperature Physics

, Volume 166, Issue 1–2, pp 49–58 | Cite as

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

  • M. Caracanhas
  • A. L. Fetter
  • S. R. Muniz
  • K. M. F. Magalhães
  • G. Roati
  • G. Bagnato
  • V. S. Bagnato
Article

Abstract

In a recent study we demonstrated the emergence of turbulence in a trapped Bose-Einstein condensate of 87Rb 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.

Keywords

Atomic quantum fluid Condensate expansion Vortices Turbulence 

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • M. Caracanhas
    • 1
  • A. L. Fetter
    • 2
  • S. R. Muniz
    • 1
  • K. M. F. Magalhães
    • 1
  • G. Roati
    • 3
  • G. Bagnato
    • 1
  • V. S. Bagnato
    • 1
  1. 1.Instituto de Física de São CarlosUniversidade de São PauloSão CarlosBrazil
  2. 2.GLAM, Departments of Physics and Applied Physics, McCullough BuildingStanford UniversityStanfordUSA
  3. 3.INO-CNR and LENSUniversita di FirenzeSesto FiorentinoItaly

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