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

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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.

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Authors and Affiliations

  1. Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970, São Carlos, SP, Brazil

    M. Caracanhas, S. R. Muniz, K. M. F. Magalhães, G. Bagnato & V. S. Bagnato

  2. GLAM, Departments of Physics and Applied Physics, McCullough Building, Stanford University, Stanford, CA, 94305-4045, USA

    A. L. Fetter

  3. INO-CNR and LENS, Universita di Firenze, via Nello Carrara 1, 50019, Sesto Fiorentino, Italy

    G. Roati

Authors
  1. M. Caracanhas
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  2. A. L. Fetter
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  3. S. R. Muniz
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  4. K. M. F. Magalhães
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  5. G. Roati
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  6. G. Bagnato
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  7. V. S. Bagnato
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Correspondence to S. R. Muniz.

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Caracanhas, M., Fetter, A.L., Muniz, S.R. et al. Self-similar Expansion of the Density Profile in a Turbulent Bose-Einstein Condensate. J Low Temp Phys 166, 49–58 (2012). https://doi.org/10.1007/s10909-011-0409-2

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  • DOI: https://doi.org/10.1007/s10909-011-0409-2

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