Sökning: "Conformal field theory"

Visar resultat 1 - 5 av 40 avhandlingar innehållade orden Conformal field theory.

  1. 1. Defects, renormalization and conformal field theory

    Författare :Alexander Söderberg Rousu; Agnese Bissi; Pedro Liendo; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; defects; boundaries; replica twist defect; conformal field theory; quantum field theory; Coleman-Weinberg mechanism; renormalization group flows; Theoretical Physics; Teoretisk fysik;

    Sammanfattning : Defects in quantum field theories appear in many different contexts and are of great physical interest. Among other things, defects are used to describe the Kondō effect in condensed matter, confinement in quantum chromodynamics, Rényi entropy in quantum information and cosmic strings in string theory. LÄS MER

  3. 2. Conformal Field Theory and D-branes

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

    Sammanfattning : 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. LÄS MER

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

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

    Sammanfattning : 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. LÄS MER

  5. 4. Hopf and Frobenius algebras in conformal field theory

    Författare :Carl Stigner; Jürgen Fuchs; Jens Fjelstad; Ingo Runkel; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; conformal field theory; category theory; Hopf algebra; Frobenius algebra; coends; mapping class group; defect lines; factorization constraints; Physics; Fysik;

    Sammanfattning : There are several reasons to be interested in conformal field theories in two dimensions. Apart from arising in various physical applications, ranging from statistical mechanics to string theory, conformal field theory is a class of quantum field theories that is interesting on its own. First of all there is a large amount of symmetries. LÄS MER

  7. 5. Vertex Operators, String Vertices and Conformal Field Theory Deformations

    Författare :Per Sundell; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; conformal field theory; vertex operator; Riemann surface; supersymmetry; Reggeon; string theory; sewing;

    Sammanfattning : We compute multi-string interaction vertices by sewing of basic string interaction vertex operators, so called dual Reggeon vertex operators. These operators describe the interaction between two complete external string sectors. They are particularly useful when the interactions involve twisted sectors. LÄS MER