Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 125 for “"Solitons"”.
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Ambient Obstruction Solitons And Homogeneous Gradient Bach Solitons
… between metrics and curvature. Examining solitons, specifically gradient solitons, is one way we investigate this relationship. </p><p>This thesis focuses on the geometric flows associated with the Bach tensor and the ambient obstruction tensor. The Bach tensor is realized as the gradient …
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Ambient Obstruction Solitons and Homogeneous Gradient Bach Solitons
… between metrics and curvature. Examining solitons, specifically gradient solitons, is one way we investigate this relationship. </p><p>This thesis focuses on the geometric flows associated with the Bach tensor and the ambient obstruction tensor. The Bach tensor is realized as the gradient …
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Solitons in Magnetic Systems
… 3 reports results on oscillations of magnetic solitons under a uniform external force field in immiscible BEC mixtures/easy-axis ferromagnets, interpreting the phenomenon as an example of Josephson physics. Chapter 4 explores the collisional dynamics of solitary waves increasingly far from the …
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Parametrically driven dark solitons
This is a study of the dynamics of the dark solitons described by the parametrically driven nonlinear Schrödinger equation. We prove that both types of dark solitons (the Bloch and Néel walls) are stable throughout their existence regions, and that in the region of their coexistence, a family of …
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Solitons and Volume Preserving Flow
Solitons arise as solutions to non-linear partial differential equations. These equations are only analytically solvable in very few special cases. Other solutions must be found numerically. A useful technique for obtaining static solutions is gradient flow. Gradient flow evolution is in a …
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Quantum theory of optical solitons
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1991.
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Dark solitons in optical communication systems
… and theoretical work on the use of dark optical solitons as data carriers in communications systems. The background chapters provide an introduction to nonlinear optics, and to dark solitons, described as intensity dips in a bright background, with an asymmetrical phase profile. The motivation …
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Experimental transmission of dispersion managed solitons
… on the power dispersion relationship for solitons are investigated. The detrimental effects of soliton-soliton interactions, which are increased due to the greater overlap breathing solitons are discussed. A technique for reducing the soliton-soliton interactions through amplifier …
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Solitons and radiation in nonintegrable systems
Word processed copy. Includes bibliographical references (p. [171]-182).
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Signal processing and communication with solitons
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Stable Spatial Solitons In Semiconductor Optical Amplifiers
… of light or a self induced waveguide. Spatial solitons appear as a result of the balance of diffraction and nonlinear focusing in a system. They have been observed in many different conservative media in the last couple of years. Solitons are ubiquitous, because of the probability of using …
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Solitons and dualities in 2+1 dimensions
… roles of topological field theory, topological solitons, and duality. First, we consider the dynamics of nonrelativistic Chern--Simons-matter theories in $2+1$ dimensions. The theories we consider support vortex solutions and, at critical coupling, they admit an effective low-temperature …
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WDM of solitons in dispersion managed transmission systems
… thesis investigates the physical behaviour of solitons in wavelength division multiplexed (WDM) systems with dispersion management in a wide range of dispersion regimes. Background material is presented to show how solitons propagate in optical fibres, and key problems associated with real …
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Ultra high-speed transmission using dispersion managed solitons
… of ultra high-speed transmission using DM solitons. The theory of propagation in optical fibres is presented with specific reference to optical communication systems. This theory is then expanded to. incorporate dispersion-managed transmission and the dispersion managed soliton. The first …
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Implementation of a circuit for communication using solitons
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Dynamics and interactions of cavity solitons in photonic devices
… study of the properties and dynamics of cavity solitons in photonic systems. Three systems are investigated - a semiconductor laser with optical injection, a semiconductor laser with frequency selective feedback and a nonlinear cavity with a Kerr material. Cavity solitons have common features …
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mKdV Loop Travelling Waves and Interactions of Loop Solitons
… a deeper understanding of the mKdV equation and solitons.
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