Vortex rings and vortex ring solitons in shaken Bose-Einstein condensate

24th International Laser Physics Workshop

Yukalov, V.I.^1 ; Novikov, A.N.^1,2 ; Yukalova, E.P.^3 ; Bagnato, V.S.^2

Bogolubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna

141980, Russia^1

Instituto de Fisica de São Calros, Universidade de São Paulo, CP 369, Sao Carlos, Sao Paulo

13560-970, Brazil^2

Laboratory of Informational Technologies, Joint Institute for Nuclear Research, Dubna

141980, Russia^3

关键词: Bose-Einstein condensates;    Coherent modes;    Cylindrical traps;    Hermite;    Laguerre;    Perturbation theory;    Vortex rings;    Vortex-ring solitons;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/691/1/012019/pdf
DOI  :  10.1088/1742-6596/691/1/012019

来源: IOP

【 摘 要 】

In a shaken Bose-Einstein condensate, confined in a vibrating trap, there can appear different nonlinear coherent modes. Here we concentrate on two types of such coherent modes, vortex ring solitons and vortex rings. In a cylindrical trap, vortex ring solitons can be characterized as nonlinear Hermite-Laguerre modes, whose description can be done by means of optimized perturbation theory. The energy, required for creating vortex ring solitons, is larger than that needed for forming vortex rings. This is why, at a moderate excitation energy, vortex rings appear before vortex ring solitons. The generation of vortex rings is illustrated by numerical simulations for trapped87Rb atoms.