Solitonic vortices in Bose-Einstein condensates

Anno: 2015

Autori: Tylutki M., Donadello S., Serafini S., Pitaevskii L.P., Dalfovo F., Lamporesi G., Ferrari G.

Affiliazione autori: Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; RAS, Kapitza Inst Phys Problems, Moscow 119334, Russia.

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 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.

Giornale/Rivista: EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS

Volume: 224 (3)      Da Pagina: 577  A: 583

Maggiori informazioni: We thank J. Brand, C. Tozzo and M. Zwierlein for stimulating discussions. We acknowledge financial support by Provincia Autonoma di Trento and by PL-Grid Infrastructure.
Parole chiavi: Cosmological Experiments; Superfluid
DOI: 10.1140/epjst/e2015-02389-7

Citazioni: 18
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
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