12 results match your criteria solitons constituents

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Orbital-angular-momentum-resolved diagnostics for tracking internal phase evolution in multi-bound solitons.

Opt Express 2021 May;29(11):16686-16694

The generation of multi-bound solitons is a fascinating subject of investigation in many conservative and dissipative systems, such as photonics, fluid mechanics, Bose-Einstein condensates, and so on. In this study, we demonstrate the successful extraction of phase dynamics between solitons in bound multiple solitons with up to seven constituents in a mode-locked Er laser system. By mapping the internal phase motions of multi-bound solitons to the spatial phase movement of cylindrical vector beams using orbital angular momentum (OAM)-based diagnostics, different categories of internal pulsations are revealed. Read More

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Brane Effective Actions, Kappa-Symmetry and Applications.

Authors:
Joan Simón

Living Rev Relativ 2012 27;15(1). Epub 2012 Feb 27.

School of Mathematics, The University of Edinburgh, and Maxwell Institute for Mathematical Sciences, Edinburgh, EH9 3JZ UK.

This is a review on brane effective actions, their symmetries and some of their applications. Its first part covers the Green-Schwarz formulation of single M- and D-brane effective actions focusing on kinematical aspects: the identification of their degrees of freedom, the importance of world volume diffeomorphisms and kappa symmetry to achieve manifest spacetime covariance and supersymmetry, and the explicit construction of such actions in arbitrary on-shell supergravity backgrounds. Its second part deals with applications. Read More

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February 2012

Multicomponent dipole-mode spatial solitons.

Opt Lett 2002 Apr;27(8):634-6

We study (2+1) -dimensional multicomponent spatial vector solitons with a nontrivial topological structure of their constituents and demonstrate that these solitary waves exhibit a symmetry-breaking instability, provided their total topological charge is nonzero. We describe a novel type of stable multicomponent dipole-mode solitons with intriguing swinging dynamics. Read More

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Interactions of parametrically driven dark solitons. I. Néel-Néel and Bloch-Bloch interactions.

Phys Rev E Stat Nonlin Soft Matter Phys 2007 Feb 9;75(2 Pt 2):026604. Epub 2007 Feb 9.

Department of Physics, University of Bayreuth, D-95440 Bayreuth, Germany.

We study interactions between the dark solitons of the parametrically driven nonlinear Schrödinger equation, Eq. 1 . When the driving strength, h , is below sqrt[gamma(2)+1/9], two well-separated Néel walls may repel or attract. Read More

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February 2007

Incoherent white-light solitons in nonlinear periodic lattices.

Phys Rev E Stat Nonlin Soft Matter Phys 2006 May 18;73(5 Pt 2):056608. Epub 2006 May 18.

Department of Physics, University of Zagreb, Croatia.

We predict the existence of lattice solitons made of incoherent white light: lattice solitons made of light originating from an ordinary incandescent light bulb. We find that the intensity structure and spatial power spectra associated with different temporal frequency constituents of incoherent white-light lattice solitons (IWLLSs) arrange themselves in a characteristic fashion, with the intensity structure more localized at higher frequencies, and the spatial power spectrum more localized at lower frequencies; the spatial correlation distance is larger at lower frequency constituents of IWLLSs. This characteristic shape of incoherent white-light lattice solitons reflects the fact that diffraction is stronger for lower temporal frequency constituents, while higher frequencies experience stronger effective nonlinearity and deeper lattice structure. Read More

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Multipole-mode surface solitons.

Opt Lett 2006 Jul;31(14):2172-4

ICFO-Institut de Ciencies Fotoniques and Universitat Politecnica de Catalunya, Barcelona, Spain.

We discover multipole-mode solitons supported by the surface between two distinct periodic lattices imprinted in Kerr-type nonlinear media. Such solitons are possible because the refractive index modulation at both sides of the interface glues together their out-of-phase individual constituents. Remarkably, we find that the new type of solitons may feature highly asymmetric shapes, and yet they are stable over wide domains of their existence, a rare property to be attributed to their surface nature. Read More

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Observation of random-phase gap solitons in photonic lattices.

Opt Lett 2006 Feb;31(4):483-5

Department of Physics, Technion-Israel Institute of Technology, Haifa 32000, Israel.

We report what is to our knowledge the first experimental observation of gap random-phase lattice solitons: self-trapped spatially incoherent entities whose modal constituents lie within a photonic bandgap. Read More

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February 2006

Soliton eigenvalue control in optical lattices.

Phys Rev Lett 2004 Oct 27;93(14):143902. Epub 2004 Sep 27.

ICFO-Institut de Ciencies Fotoniques, and Department of Signal Theory and Communications, Universitat Politecnica de Catalunya, 08034 Barcelona, Spain.

We address the dynamics of higher-order solitons in optical lattices, and predict their self-splitting into the set of their single-soliton constituents. The splitting is induced by the potential introduced by the lattice, together with the imprinting of a phase tilt onto the initial multisoliton states. The phenomenon allows the controllable generation of several coherent solitons linked via their Zakharov-Shabat eigenvalues. Read More

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October 2004

Two-dimensional higher-band vortex lattice solitons.

Opt Lett 2004 Sep;29(17):2049-51

Department of Physics and Solid State Institute, Technion, Haifa 32000, Israel.

We study self-localized second-band vortex states in two-dimensional photonic lattices and find stable ring solitons whose phase forms an array of counterrotating vortices. We also identify composite solitons in which a second-band vortex is jointly trapped with a mode arising from the first band and study their stability. When such a composite entity is unstable, it disintegrates while exchanging angular momentum between its constituents, eventually stabilizing into another form of composite soliton. Read More

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September 2004

Packing, unpacking, and steering of multicolor solitons in optical lattices.

Opt Lett 2004 Jun;29(12):1399-401

ICFO-Institut de Ciencies Fotoniques and Department of Signal Theory and Communications, Universitat Politecnica de Catalunya, 08034 Barcelona, Spain.

We discuss potential applications of multicolor solitons supported by periodic lattices imprinted in quadratic nonlinear media. Such lattice solitons can be packed together with appropriate relative phases to form stable soliton trains that can be treated as bit sequences. We describe controllable splitting of the trains into their soliton constituents and the angle- and power-controlled steering and trapping of solitons moving across the lattice into the desired guiding channel. Read More

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Electron-acoustic plasma waves: oblique modulation and envelope solitons.

Phys Rev E Stat Nonlin Soft Matter Phys 2004 Mar 31;69(3 Pt 2):036411. Epub 2004 Mar 31.

Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany.

Theoretical and numerical studies are presented of the amplitude modulation of electron-acoustic waves (EAWs) propagating in space plasmas whose constituents are inertial cold electrons, Boltzmann distributed hot electrons, and stationary ions. Perturbations oblique to the carrier EAW propagation direction have been considered. The stability analysis, based on a nonlinear Schrödinger equation, reveals that the EAW may become unstable; the stability criteria depend on the angle theta between the modulation and propagation directions. Read More

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Incoherent white light solitons in logarithmically saturable noninstantaneous nonlinear media.

Phys Rev E Stat Nonlin Soft Matter Phys 2003 Sep 11;68(3 Pt 2):036607. Epub 2003 Sep 11.

Physics Department, Technion - Israel Institute of Technology, Haifa 32000, Israel.

We analytically demonstrate the existence of white light solitons in logarithmically saturable noninstantaneous nonlinear media. This incoherent soliton has elliptic Gaussian intensity profile, and elliptic Gaussian spatial correlation statistics. The existence curve of the soliton connects the strength of the nonlinearity, the spatial correlation distance as a function of frequency, and the characteristic width of the soliton. Read More

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September 2003
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