Now showing items 2-11 of 11

  • Bright solitons from defocusing nonlinearities 

    Borovkova, Olga V.; Kartashov, Yaroslav; Torner Sabata, Lluís; Malomed, Boris A. (2011-09-19)
    Article
    Restricted access - publisher's policy
    We report that defocusing cubic media with spatially inhomogeneous nonlinearity, whose strength increases rapidly enough toward the periphery, can support stable bright localized modes. Such nonlinearity landscapes give ...
  • Non-standard Hubbard models in optical lattices: a review 

    Dutta, Omjyoti; Gajda, Mariusz; Lewenstein, Maciej; Lühmann, Dirk-Sören; Malomed, Boris A.; Sowiński, Tomasz; Zakrzewski, Jakub (IOP, 2015-05-28)
    Article
    Open Access
    Originally, the Hubbard model was derived for describing the behavior of strongly correlated electrons in solids. However, for over a decade now, variations of it have also routinely been implemented with ultracold atoms ...
  • Self-trapping and splitting of bright vector solitons under inhomogeneous defocusing nonlinearities 

    Kartashov, Yaroslav; Vysloukh, Victor A.; Torner Sabata, Lluís; Malomed, Boris A. (2011-12-01)
    Article
    Restricted access - publisher's policy
    We show that bimodal systems with a spatially nonuniform defocusing cubic nonlinearity, whose strength grows toward the periphery, can support stable two-component solitons. For a sufficiently strong cross-phase-modulation ...
  • Soliton gyroscopes in media with spatially growing repulsive nonlinearity 

    Driben, Rodislav; Kartashov, Yaroslav; Malomed, Boris A.; Meier, Torsten; Torner Sabata, Lluís (2014-01-15)
    Article
    Open Access
    We find that the recently introduced model of self-trapping supported by a spatially growing strength of a repulsive nonlinearity gives rise to robust vortex-soliton tori, i.e., three-dimensional vortex solitons, with ...
  • Solitons supported by spatially inhomogeneous nonlinear losses 

    Borovkova, Olga V.; Kartashov, Yaroslav; Vysloukh, Victor A.; Lobanov, Valery E.; Malomed, Boris A.; Torner Sabata, Lluís (2012)
    Article
    Restricted access - publisher's policy
    We uncover that, in contrast to the common belief, stable dissipative solitons exist in media with uniform gain in the presence of nonuniform cubic losses, whose local strength grows with coordinate η (in one dimension) ...
  • Stabilization of spatiotemporal solitons in Kerr media by dispersive coupling 

    Kartashov, Yaroslav V.; Malomed, Boris A.; Konotop, Vladimir V.; Lobanov, Valery E.; Torner Sabata, Lluis (OSA, 2015-03-11)
    Article
    Open Access
    We introduce a mechanism to stabilize spatiotemporal solitons in Kerr nonlinear media, based on the dispersion of linear coupling between the field components forming the soliton states. Specifically, we consider solitons ...
  • Three-dimensional hybrid vortex solitons 

    Driben, Rodislav; Kartashov, Yaroslav; Malomed, Boris A.; Meier, Torsten; Torner Sabata, Lluís (2014-06-16)
    Article
    Open Access
    We show, by means of numerical and analytical methods, that media with a repulsive nonlinearity which grows from the center to the periphery support a remarkable variety of previously unknown complex stationary and dynamical ...
  • Twisted toroidal vortex solitons in inhomogeneous media with repulsive nonlinearity 

    Kartashov, Yaroslav V.; Malomed, Boris A.; Shnir, Yasha; Torner Sabata, Lluís (2014-12-24)
    Article
    Open Access
    Toroidal 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 ...
  • Unbreakable PT symmetry of solitons supported by inhomogeneous defocusing nonlinearity 

    Kartashov, Yaroslav; Malomed, Boris A.; Torner Sabata, Lluís (OSA, 2014-09-24)
    Article
    Open Access
  • Unbreakable PT symmetry of solitons supported by inhomogeneous defocusing nonlinearity 

    Kartashov, Yaroslav V.; Malomed, Boris A.; Torner Sabata, Lluís (2014-09-01)
    Article
    Restricted access - publisher's policy
    We consider bright solitons supported by a symmetric inhomogeneous defocusing nonlinearity growing rapidly enough toward the periphery of the medium, combined with an antisymmetric gain-loss profile. Despite the absence ...