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dc.contributor.authorKartashov, Yaroslav V.
dc.contributor.authorMalomed, Boris A.
dc.contributor.authorShnir, Yasha
dc.contributor.authorTorner Sabata, Lluís
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.identifier.citationKartashov, Y.V. [et al.]. Twisted toroidal vortex solitons in inhomogeneous media with repulsive nonlinearity. "Physical review letters", 24 Desembre 2014, vol. 113, núm. 26, p. 264101-1-264101-5.
dc.description.abstractToroidal modes in the form of so-called Hopfions, with two independent winding numbers, a hidden one (twist s), which characterizes a circular vortex thread embedded into a three-dimensional soliton, and the vorticity around the vertical axis (m), appear in many fields, including field theory, ferromagnetics, and semi- and superconductors. Such topological states are normally generated in multicomponent systems, or as trapped quasilinear modes in toroidal potentials. We uncover that stable solitons with this structure can be created, without any linear potential, in the single-component setting with the strength of repulsive nonlinearity growing fast enough from the center to the periphery, for both steep and smooth modulation profiles. Toroidal modes with s=1 and vorticity m=0, 1, 2 are produced. They are stable for m=1, and do not exist for s>1. An approximate analytical solution is obtained for the twisted ring with s=1, m=0. Under the application of an external torque, it rotates like a solid ring. The setting can be implemented in a Bose-Einstein condensate (BEC) by means of the Feshbach resonance controlled by inhomogeneous magnetic fields.
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica
dc.subjectÀrees temàtiques de la UPC::Ciències de la visió::Òptica física
dc.subject.lcshNonlinear optics
dc.subject.otherBose-Einstein condensation
dc.subject.otherPlasma theory
dc.subject.otherStatistical mechanics
dc.subject.otherVortex flow
dc.subject.otherApproximate analytical solutions
dc.subject.otherBose-Einstein condensates
dc.subject.otherFeshbach resonances
dc.subject.otherInhomogeneous magnetic field
dc.subject.otherInhomogeneous media
dc.subject.otherMulti-component systems
dc.subject.otherTopological state
dc.subject.otherToroidal vortices
dc.titleTwisted toroidal vortex solitons in inhomogeneous media with repulsive nonlinearity
dc.subject.lemacÒptica no lineal
dc.contributor.groupUniversitat Politècnica de Catalunya. FOTONICA - Grup de Recerca de Fotònica
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author’s final draft)
upcommons.citation.authorKartashov, Y.V.; Malomed, B.; Shnir, Y.; Torner, L.
upcommons.citation.publicationNamePhysical review letters

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