Solitonic vortices in Bose-Einstein condensates
Authors: Tylutki M., Donadello S., Serafini S., Pitaevskii L.P., Dalfovo F., Lamporesi G., Ferrari G.
Autors Affiliation: INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, 38123 Povo, Italy
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.
Journal/Review: EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
Volume: 224 (3) Pages from: 577 to: 583
More Information: 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.DOI: 10.1140/epjst/e2015-02389-7Citations: 11data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-08-09References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here