Search for dissertations about: "topological dynamics"

Showing result 1 - 5 of 25 swedish dissertations containing the words topological dynamics.

  1. 1. Magnetization dynamics on the nanoscale From first principles to atomistic spin dynamics

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Jonathan Philippe Chico Carpio; Uppsala universitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Abstract : In this thesis first-principles methods, based on density functional theory, have been used to characterize a wide range of magnetic materials. Special emphasis has been put on pairwise magnetic interactions, such as Heisenberg exchange and Dzyaloshinskii-Moriya interactions, and also on in the Gilbert damping parameter. READ MORE

  2. 2. Electronic Structure and Lattice Dynamics of Elements and Compounds

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Petros Souvatzis; Uppsala universitet.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Atomic and molecular physics; electronic structure; lattice dynamics; first-principles theory; self-consistent lattice dynamical calculation; elasticity; super plasticity; electronic topological transition; equation of state; Atom- och molekylfysik;

    Abstract : The elastic constants of Mg(1-x)AlxB2 have been calculated in the regime 0<x<0.25. The calculations show that the ratio, B/G, between the bulk- and the shear-modulus stays well below the empirical ductility limit, 1. READ MORE

  3. 3. Strongly non-linear magnetization dynamics in nano-structures: perturbations, multi-mode generation, and topological droplets

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Ezio Iacocca; Göteborgs universitet.; Gothenburg University.; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Spin torque oscillators; Spintronics;

    Abstract : Spin torque oscillators (STOs) are magnetic nano-devices in which strongly non-linear magnetodynamic phenomena can be excited by current. In this thesis, we study some of these phenomena by means of micromagnetic simulations, analytical calculations, and electrical characterization. Three main subjects are discussed: 1. READ MORE

  4. 4. Dynamics of Smooth Hyperbolic Systems with Singularities

    University dissertation from Matematikcentrum

    Author : Tomas Persson; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Matematik; Mathematics; Dimension Theory; Hyperbolic Dynamics; Subshift; SRB-measure;

    Abstract : This thesis is about dynamics of piecewise hyperbolic maps on bounded sets in the plane and on the interval. It is based on the following papers: T. Persson, A piecewise hyperbolic map with absolutely continuous invariant measure, Dynamical Systems: An International Journal, 21:3 (2006), 363--378 T. READ MORE

  5. 5. Logical Dynamics and Dynamical Systems

    University dissertation from Media-Tryck, Lund University, Sweden

    Author : Rasmus Kraemmer Rendsvig; [2018-02]
    Keywords : Formal epistemology; Modal logic; Dynamic epistemic logic; Dynamical systems; General topology;

    Abstract : This thesis is on information dynamics modeled using *dynamic epistemic logic* (DEL). It takes the simple perspective of identifying models with maps, which under a suitable topology may be analyzed as *topological dynamical systems*. It is composed of an introduction and six papers. READ MORE