Exploració per tema "Solitons"

Ara es mostren els items 1-20 de 51

    • All-optical soliton control in photonic lattices 

      Xu, Zhiyong (Universitat Politècnica de Catalunya, 2007-11-27)
      Tesi
      Accés obert
      Los solitones ópticos son paquetes de luz (haces y/o pulsos) que no se dispersan gracias al balance entre difracción/dispersión y no linealidad. Al propagarse e interactuar los unos con los otros muestran propiedades que ...

    • Asymmetric soliton mobility in competing linear-nonlinear parity-time-symmetric lattices 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2016-09-15)
      Article
      Accés restringit per política de l'editorial
      We address the transverse mobility of spatial solitons in competing parity-time-symmetric linear and nonlinear lattices. The competition between out-of-phase linear and nonlinear lattices results in a drastic mobility ...

    • Asymmetric solitons and domain walls supported by inhomogeneous defocusing nonlinearity 

      Kartashov, Yaroslav V.; Lobanov, Valery E.; Malomed, Boris A.; Torner Sabata, Lluís (2013-12-01)
      Article
      Accés restringit per política de l'editorial
      We show that an inhomogeneous defocusing nonlinearity that grows toward the periphery in the positive and negative transverse directions at different rates can support strongly asymmetric fundamental and multipole bright ...

    • Bose-Einstein condensates with localized spin-orbit coupling: Soliton complexes and spinor dynamics 

      Kartashov, Yaroslav; Konotop, Vladimir V; Zezyulin, Dmitry A (2014-12-15)
      Article
      Accés obert
      Spin-orbit (SO) coupling can be introduced in a Bose-Einstein condensate (BEC) as a gauge potential acting only in a localized spatial domain. The effect of such a SO “defect” can be understood by transforming the system to ...

    • Bright solitons from defocusing nonlinearities 

      Borovkova, Olga V.; Kartashov, Yaroslav; Torner Sabata, Lluís; Malomed, Boris A. (2011-09-19)
      Article
      Accés restringit per política de l'editorial
      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 ...

    • Cavity behavior of second and third harmonic inhomogeneous solutions of Maxwell’s equations 

      Roppo, Vito; Cojocaru, Crina; Trull Silvestre, José Francisco; Vilaseca Alavedra, Ramon; Scalora, M. (2010)
      Article
      Accés restringit per política de l'editorial
      We study second and third harmonic generation of ultrashort pulses in a cavity environment and focus on the role of a phase locking phenomenon that causes the pump to trap and drag the generated harmonic fields. The results ...

    • Cavity solitons in a microring dimer with gain and loss 

      Milián, Carles; Kartashov, Yaroslav V.; Skryabin, Dmitry V.; Torner Sabata, Lluís (2018-02-20)
      Article
      Accés obert
      We address a pair of vertically coupled microring resonators with gain and loss pumped by a single-frequency field. Coupling between microrings results in a twofold splitting of the single microring resonance that increases ...

    • Convectons 

      Alonso Maleta, María Aránzazu; Batiste Boleda, Oriol; Knobloch, Edgar; Mercader Calvo, María Isabel (Springer, 2011-01-01)
      Capítol de llibre
      Accés obert
      A horizontal layer containing a miscible mixture of two fluids can generate dissipative solitons called convectons when heated from below. The physics of the system leading to this behavior is explained, and the properties ...

    • Dissipative solitons in binary fluid convection 

      Mercader Calvo, María Isabel; Batiste Boleda, Oriol; Alonso Maleta, María Aránzazu; Knobloch, Edgar (American Institute of Mathematical Sciences, 2011-10-01)
      Article
      Accés restringit per política de l'editorial
      A horizontal layer containing a miscible mixture of two fluids can produce dissipative solitons when heated from below. The physics of the system is described, and dissipative solitons are computed using numerical continuation ...

    • Dynamic Y-branched structures in quadratic nonlinear media 

      Santos Blanco, M. Concepción (ELSEVIER SCIENCE BV, 2000-06-30)
      Article
      Accés obert
      A selfsplitting of the beams entering a waveguide made of a quadratic nonlinear material is observed numerically. Relative π phase differences between harmonics as positively contributing to linear diffraction are shown ...

    • Dynamics of matter wave solitons 

      Polo Gómez, Juan (Universitat Politècnica de Catalunya / Universitat Autònoma de Barcelona, 2012-09-04)
      Projecte Final de Màster Oficial
      Accés obert
      [ANGLÈS] We study the implementation of a matter wave bright soliton interferometer formed by a Gaussian potential barrier placed at the center of a harmonic trap potential. After numerically evaluating the transmission ...

    • Dynamics of one-dimensional quantum droplets 

      Astrakharchik, Grigori; Malomed, Boris A. (American Physical Society (APS), 2018-07-30)
      Article
      Accés obert
      The structure and dynamics of one-dimensional binary Bose gases forming quantum droplets is studied by solving the corresponding amended Gross-Pitaevskii equation. Two physically different regimes are identified, corresponding ...

    • Exactly solvable system of one-dimensional trapped bosons with short- and long-range interactions 

      Astrakharchik, Grigori (American Institute of Physics (AIP), 2020-11-25)
      Article
      Accés obert
      We introduce a model of trapped bosons with contact interactions as well as Coulomb repulsion or gravitational attraction in one spatial dimension. We find the exact ground-state energy and many-body wave function. The ...

    • Floquet edge multicolor solitons 

      Ivanov, Seergey K.; Kartashov, Yaroslav V.; Szameit, Alexander; Torner Sabata, Lluís; Konotop, Vladimir V. (John Wiley & sons, 2022-03)
      Article
      Accés obert
      Topological insulators are unique physical structures that are insulators in their bulk, but support currents at their edges which can be unidirectional and topologically protected from scattering on disorder and ...

    • Frontiers in Multidimensional Self-Trapping of Nonlinear Fields and Matter 

      Kartashov, Yaroslav; Astrakharchik, Grigori; Malomed, Boris A.; Torner Sabata, Lluís (Nature, 2019-02-22)
      Article
      Accés obert
      2D and 3D solitons and related states, such as quantum droplets, can appear in optical systems, atomic Bose–Einstein condensates (BECs) and liquid crystals, among other physical settings. However, multidimensional solitary ...

    • Gap soliton in a waveguide array with a saturating defocusing nonlinearity 

      Gaizzuskas, E; Savickas, A.; Staliunas, Kestutis (2014-03-01)
      Article
      Accés restringit per política de l'editorial
      We investigate radiation of the solitary waves in the first band gap of the waveguide array with a defocusing nonlinearities of different types (Kerr nonlinearity and saturating nonlinearity). We confirm recent findings ...

    • Impurity solitons with quadratic nonlinearities 

      Clausen, C B; Pérez Torres, Juan; Torner Sabata, Lluís (1998-12)
      Article
      Accés restringit per política de l'editorial
      We find families of solitary waves mediated by parametric mixing in quadratic nonlinear media that are localized at point-defect impurities. Solitons localized at attractive impurities are found to be dynamically stable. ...

    • Lieb polariton topological insulators 

      Li, Chunyan; Ye, Fangwei; Chen, Xianfeng; Kartashov, Yaroslav V.; Ferrando, Albert; Torner Sabata, Lluís; Skryabin, Dmitry V. (American Physical Society, 2018-02-12)
      Article
      Accés obert
      We predict that the interplay between the spin-orbit coupling, stemming from the transverse electric–transverse magnetic energy splitting, and the Zeeman effect in semiconductor microcavities supporting exciton-polariton ...

    • Light bullets in Su-Schrieffer-Heeger photonic topological insulators 

      Ivanov, Sergey K.; Kartashov, Yaroslav V.; Torner Sabata, Lluís (American Physical Society, 2023-03-21)
      Article
      Accés obert
      We introduce a different class of thresholdless three-dimensional soliton states that form in higher-order topological insulators based on a two-dimensional Su-Schrieffer-Heeger array of coupled waveguides. The linear ...

    • Multifrequency solitons in commensurate-incommensurate photonic moiré lattices 

      Kartashov, Yaroslav V.; Ye, Fangwei; Konotop, Vladimir V.; Torner Sabata, Lluís (American Institute of Physics (AIP), 2021-10-15)
      Article
      Accés obert
      We predict that photonic moiré patterns created by two mutually twisted periodic sublattices in quadratic nonlinear media allow the formation of parametric solitons under conditions that are strongly impacted by the geometry ...