Search for dissertations about: "Institutionen för teoretisk fysik."

Showing result 1 - 5 of 191 swedish dissertations containing the words Institutionen för teoretisk fysik..

  1. 1. On transport theory of correlated mesoscopic systems

    Author : Vadim Cheianov; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Theoretical physics; Teoretisk fysik; Physics; Fysik; fysik; Physics;

    Abstract : This thesis is about the theory of quantum transport through low dimensional correlated systems. Correlated systems are interacting many-particle systems where collective effects predominate over the individual properties of particles whereof they consist. Single particle approach to correlated systems would be essentially wrong. READ MORE

  2. 2. Quaternionic Transgression in Hyperkähler Geometry

    Author : Alexei Kotov; Edwin Langmann; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Theoretical physics; Hyperkähler manifold; Hyperholomorphic bundle; Superconnection; Local index theorem; Chiral determinant; Transgression; Teoretisk fysik; Physics; Fysik; Theoretical Physics; teoretisk fysik;

    Abstract : It is known, that hyperkähler varieties being a special case of Riemann and Kähler manifolds, admit more symmetries. For this reason, all important structures possibly admit hyperkähler generalization. Some of these generalizations make a theme of this thesis. READ MORE

  3. 3. On path integral localization and the Laplacian

    Author : Topi Kärki; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Theoretical physics; Teoretisk fysik; Physics; Fysik; Theoretical Physics; teoretisk fysik;

    Abstract : In this thesis, we develop path integral localization methods that are familiar from topological field theory: the integral over the infinite dimensional integration domain depends only on local data around some finite dimensional subdomain.We introduce a new localization principle that unifies BRST localization, the non-Abelian localization principle and the conformal generalization of the Duistermaat-Heckman integration formula. READ MORE

  4. 4. The Whittaker model of the center of the quantum group and Hecke algebras

    Author : Alexei Sevostianov; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Theoretical physics; Teoretisk fysik; Physics; Fysik; Theoretical Physics; teoretisk fysik;

    Abstract : In 1978 Kostant suggested the Whittaker model of the center of the universal enveloping algebra U(g) of a complex simple Lie algebra g. An essential role in this construction is played by a non-singular character χ of the maximal nilpotent subalgebra n+ ⊂ g. READ MORE

  5. 5. Supersymmetry, branes and the mysterious M

    Author : Pär Stjernberg; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Theoretical physics; Teoretisk fysik; Physics; Fysik; Theoretical Physics; teoretisk fysik;

    Abstract : String theory is the only known theory that unifies general relativity and quantum mechanics in a consistent way. In recent years there has been a dramatic progress in the understanding of the non-perturbative aspects of string theory. It is now believed that string theory is part of a larger theory called M-theory. READ MORE