Search for dissertations about: "field theory"

Showing result 1 - 5 of 1331 swedish dissertations containing the words field theory.

  1. 1. Cluster Effective Field Theory

    Author : EMIL RYBERG; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; effective field theory; charge radius; resonant state; renormalization; radiative capture; halo nuclei; power counting; nuclear physics; few-body physics;

    Abstract : Halo nuclei are loosely bound systems consisting of a core plus valence nucleon(s). In so called Halo, or Cluster, effective field theory, the core of the halo nucleus is treated as an effective degree-of-freedom without internal structure. READ MORE

  2. 2. Conformal Field Theory and D-branes

    Author : Albrecht Wurtz; Jürgen Fuchs; Bert Schellekens; Karlstads universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; String theory; Conformal field theory; Vertex algebras; D-branes; Physics; Fysik; Physics; Fysik;

    Abstract : The main topic of this doctoral thesis is D-branes in string theory, expressed in the language of conformal field theory. The purpose of string theory is to describe the elementary particles and the fundamental interactions of nature, including gravitation as a quantum theory. READ MORE

  3. 3. Supergravity, branes and field theory

    Author : Björn Brinne; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Supergravity; Quantum field theory; Supergravitation; Kvantfältteori;

    Abstract : .... READ MORE

  4. 4. Strings, Conformal Field Theory and Noncommutative Geometry

    Author : Keizo Matsubara; Anton Alekseev; Edwin Langmann; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Theoretical physics; Theoretical physics; String theory; Conformal field theory; Noncommutative geometry; Star-products; Teoretisk fysik; Physics; Fysik;

    Abstract : This thesis describes some aspects of noncommutative geometry and conformal field theory. The motivation for the investigations made comes to a large extent from string theory. This theory is today considered to be the most promising way to find a solution to the problem of unifying the four fundamental interactions in one single theory. READ MORE

  5. 5. Aspects of Yang-Mills Theory : Solitons, Dualities and Spin Chains

    Author : Lisa Freyhult; Antti Niemi; Poul Damgaard; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Theoretical physics; Theoretical Physics; Field theory; String theory; Yang-Mills; Effective models; Supersymmetry; Solitons; Fermion number; Duality; AdS CFT correspondence; Bethe ansatz; Teoretisk fysik; Physics; Fysik;

    Abstract : One of the still big problems in the Standard Model of particle physics is the problem of confinement. Quarks or other coloured particles have never been observed in isolation. Quarks are only observed in colour neutral bound states. The strong interactions are described using a Yang-Mills theory. READ MORE