Search for dissertations about: "Institutionen För Teoretisk Fysik."
Showing result 1 - 5 of 191 swedish dissertations containing the words Institutionen För Teoretisk Fysik..
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1. On transport theory of correlated mesoscopic systems
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
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2. Quaternionic Transgression in Hyperkähler Geometry
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
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3. On path integral localization and the Laplacian
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
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4. The Whittaker model of the center of the quantum group and Hecke algebras
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
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5. Supersymmetry, branes and the mysterious M
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