Search for dissertations about: "twisted K-theory"

Found 3 swedish dissertations containing the words twisted K-theory.

2. 1. Group Extensions, Gerbes and Twisted K-theory

   Author : Pedram Hekmati; Jouko Mickelsson; Jürgen Fuchs; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mathematical physics; Matematisk fysik;

   Abstract : This thesis reviews the theory of group extensions, gerbes and twisted K-theory. Application to anomalies in gauge theory is briefly discussed. The main results are presented in two appended scientific papers. READ MORE

4. 2. Abelian Extensions, Fractional Loop Group and Quantum Fields

   Author : Pedram Hekmati; Jouko Mickelsson; Christoph Schweigert; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Lie group extensions; Lie conformal algebras; gerbes; twisted K-theory; renormalization; anomalies; D-brane charges; variational complex; Mathematical physics; Matematisk fysik;

   Abstract : This thesis deals with the theory of Lie group extensions, Lie conformal algebras and twisted K-theory, in the context of quantum physics. These structures allow for a mathematically precise description of certain aspects of interacting quantum field theories. READ MORE

5. 3. 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