Search for dissertations about: "Bimetric gravity"

Showing result 1 - 5 of 7 swedish dissertations containing the words Bimetric gravity.

  1. 1. Gravitational collapse in bimetric gravity

    Author : Marcus Högås; Edvard Mörtsell; Tomi Koivisto; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Bimetric gravity; bigravity; modified gravity; gravitational collapse; Bimetrisk gravitation; modifierad gravitation; gravitationskollaps; Theoretical Physics; teoretisk fysik;

    Abstract : Einstein’s theory of general relativity has been the prevailing theory of classical gravity for over a century. Its observational consistency is unparalleled. There are however a few (arguably) serious short-comings. READ MORE

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

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

    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

  3. 3. Strings, Gravitons, and Effective Field Theories

    Author : Igor Buchberger; Marcus Berg; Joseph A. Minahan; Karlstads universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; string theory; amplitudes; supersymmetry; particle phenomenology; BMSSM; modified gravity; bimetric; massive gravity; Lie algebras; ribbon categories; Physics; Fysik;

    Abstract : This thesis concerns a range of aspects of theoretical physics. It is composed of two parts. In the first part we motivate our line of research, and introduce and discuss the relevant concepts. In the second part, four research papers are collected. READ MORE

  4. 4. Constraints and symmetries in theories of interacting spin-2 fields

    Author : Anders Lundkvist; Fawad Hassan; Edvard Mörtsell; Antonio Padilla; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; modified gravity; bimetric theory; spin-2 fields; classical field theory; partially massless symmetry; Theoretical Physics; teoretisk fysik;

    Abstract : The Hassan-Rosen bimetric theory describes two interacting spin-2 fields, one massless and one massive. In this thesis, a complete canonical analysis of this theory is performed in the metric formulation and all constraints are computed. READ MORE

  5. 5. Unravelling Consistent Spin-2 Interactions

    Author : Mikael von Strauss; Sayed Fawad Hassan; Mikhail Volkov; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Modified Gravity; Massive Spin-2; Spin-2 Interactions; Theoretical Physics; teoretisk fysik;

    Abstract : Recently, a unique formulation of a classically consistent theory of massive spin-2 fields has emerged. In this thesis I address a few of the primary questions that arise once such a theory is available. READ MORE