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Solitonic Vortices in Bose-Einstein Condensates

Authors
  • Tylutki, Marek
  • Donadello, Simone
  • Serafini, Simone
  • Pitaevskii, Lev P.
  • Dalfovo, Franco
  • Lamporesi, Giacomo
  • Ferrari, Gabriele
Type
Published Article
Publication Date
Oct 16, 2014
Submission Date
Oct 16, 2014
Identifiers
DOI: 10.1140/epjst/e2015-02389-7
Source
arXiv
License
Yellow
External links

Abstract

We analyse, theoretically and experimentally, the nature of solitonic vortices (SV) in an elongated Bose-Einstein condensate. In the experiment, such defects are created via the Kibble-Zurek mechanism, when the temperature of a gas of sodium atoms is quenched across the BEC transition, and are imaged after a free expansion of the condensate. By using the Gross-Pitaevskii equation, we calculate the in-trap density and phase distributions characterizing a SV in the crossover from an elongate quasi-1D to a bulk 3D regime. The simulations show that the free expansion strongly amplifies the key features of a SV and produces a remarkable twist of the solitonic plane due to the quantized vorticity associated with the defect. Good agreement is found between simulations and experiments.

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