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 elongated 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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Titolo: | Solitonic vortices in Bose–Einstein condensates |
Autori: | Tylutki, Marek Jan; Donadello, Simone; Serafini, Simone; Pitaevskii, L. P.; Dalfovo, Franco; Lamporesi, Giacomo; Ferrari, Gabriele |
Autori Unitn: | |
Titolo del periodico: | THE EUROPEAN PHYSICAL JOURNAL. SPECIAL TOPICS |
Anno di pubblicazione: | 2015 |
Numero e parte del fascicolo: | 3 |
Codice identificativo Scopus: | 2-s2.0-84928319529 |
Codice identificativo ISI: | WOS:000353241900014 |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1140/epjst/e2015-02389-7 |
Handle: | http://hdl.handle.net/11572/115336 |
Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |
File in questo prodotto:
File | Descrizione | Tipologia | Licenza | |
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1410.5475v1.pdf | articolo, versione arXiv | Post-print referato (Refereed author’s manuscript) | Altra licenza (Other type of license) | Administrator |