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http://hdl.handle.net/2445/125441
Title: | Bound states of dark solitons and vortices in trapped multidimensional Bose-Einstein condensates |
Author: | Morera Navarro, Ivan Guilleumas, Montserrat Mayol, R. Muñoz Mateo, Antonio |
Keywords: | Condensació de Bose-Einstein Vòrtexs Bose-Einstein condensation Vortex-motion |
Issue Date: | 12-Oct-2018 |
Publisher: | American Physical Society |
Abstract: | We report on the existence and stability of multidimensional bound solitonic states in harmonically trapped scalar Bose-Einstein condensates. Their equilibrium separation, as a measure of the strength of the soliton- soliton or the solitonic vortex-vortex interaction, is provided for varying chemical potential μ. Static bound dark solitons are shown to be dynamically stable in elongated condensates within a range of intermediate (repulsive) interparticle-interaction strength. Beyond this range the snaking instability manifests during the time evolution of the planar solitons and produces the decay into nonstationary vortex states. A subsequent dynamical recurrence of solitons and vortices can be observed at low μ. At equilibrium, the bifurcations of bound dark solitons are bound solitonic vortices. Among them, both two-open and two-ring vortex lines are demonstrated to exist with both counter- and co-rotating steady velocity fields. The latter flow configurations evolve, for high chemical potential, into a stationary three-dimensional (3D)-chain-shaped vortex and a three vortex-antivortex-vortex ring sequence that arrest the otherwise increasing angular or linear momentum respectively. As a feature common to the bifurcated families of vortex states, their excitation spectra present unstable modes with associated oscillatory dynamics. In spite of this, the family of two-open counter-rotating vortices support dynamically stable 3D states. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevA.98.043612 |
It is part of: | Physical Review A, 2018, vol. 98, p. 043612 |
URI: | http://hdl.handle.net/2445/125441 |
Related resource: | https://doi.org/10.1103/PhysRevA.98.043612 |
ISSN: | 2469-9926 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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682514.pdf | 1.49 MB | Adobe PDF | View/Open |
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