Search for dissertations about: "Relativity theory"

Showing result 16 - 20 of 60 swedish dissertations containing the words Relativity theory.

  2. 16. Geometry of interactions in ghost-free bimetric theory

    Author : Mikica Kocic; Sayed Fawad Hassan; Tomi Koivisto; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Modified gravity; Interacting spin-2 fields; Bimetric theory; Massive gravity; teoretisk fysik; Theoretical Physics;

    Abstract : The ghost-free bimetric theory is an extension to general relativity where two metric tensors are used instead of one. A priori, the two metrics may not have compatible notions of space and time, which makes the formulation of the initial-value problem problematic. READ MORE

  4. 17. Topics in the Foundations of Quantum Theory and Relativity

    Author : Hans Westman; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : .... READ MORE

  5. 18. Pierced, Wrapped and Torn : Aspects of String Theory Compactifications

    Author : Magdalena Larfors; Ulf Danielsson; Gary Shiu; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mathematical physics; Matematisk fysik; Theoretical Physics; teoretisk fysik;

    Abstract : An outstanding problem in physics is to find a unified framework for quantum mechanics and general relativity. This is required for a better understanding of black holes and the early cosmology of the universe. String theory provides such a unification. In this thesis, we study aspects of compactifications of type IIB string theory. READ MORE

  6. 19. Riemann-Hilbert methods in general relativity and random matrix theory

    Author : Julian Mauersberger; Jonatan Lenells; Tom Claeys; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : This thesis focuses on problems in general relativity and random matrix theory that can be solved by means of Riemann-Hilbert techniques. The first part of the thesis is dedicated to solving boundary value problems related to colliding plane waves in vacuum in general relativity. READ MORE

  7. 20. Time-dependent molecular properties in the optical and x-ray regions

    Author : Ulf Ekström; Patrick Norman; Knut Faegri; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Quantum chemistry; molecular physics; x-ray spectroscopy; relativity; Computational physics; Beräkningsfysik;

    Abstract : Time-dependent molecular properties are important for the experimental characterization of molecular materials. We show how these properties can be calculated, for optical and x-ray frequencies, using novel quantum chemical methods. READ MORE