Sökning: "Theory of relativity"

Visar resultat 1 - 5 av 63 avhandlingar innehållade orden Theory of relativity.

  1. 1. Extensions of general relativity : scalar tensor theory, topology of space-time and supergravity

    Författare :Ulf Lindström; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This report together with Papers 1—11 constitute a dissertation on the subjects of Scalar Tensor Theories, Topology of Space-Time and Supergravity. These three areas are briefly introduced for providing a background to the work in 1—11. A general discussion of motivations for modifications of the Einstein theory is also offered. . LÄS MER

  3. 2. Fysikens filosofi : Diskussioner om Einstein, relativitetsteorin och kvantfysiken i Sverige 1910-1970

    Författare :Thord Silverbark; Sven Widmalm; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; History of Ideas; idéhistoria;

    Sammanfattning : This dissertation focuses on the reception of the Theory of Relativity and the Quantum Mechanics outside the field of physics, especially in the philosophical community. In the Swedish context, the study shows how the ideas and discussions about these theories belonged to different types of discourses, some existing long before the arrival of modern physics, some shortlived, and some surviving the earliest reception. LÄS MER

  4. 3. String Theory at the Horizon : Quantum Aspects of Black Holes and Cosmology

    Författare :Martin Olsson; Ulf Danielsson; Lárus Thorlacius; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Theoretical physics; theoretical physics; string theory; black holes; cosmology; de Sitter space; c=1 matrix models; 2D string theory; topological string theory; conifolds; 4D BPS black holes; Gödel universe; closed time-like curves; Teoretisk fysik; Physics; Fysik;

    Sammanfattning : String theory is a unified framework for general relativity and quantum mechanics, thus being a theory of quantum gravity. In this thesis we discuss various aspects of quantum gravity for particular systems, having in common the existence of horizons. LÄS MER

  5. 4. Shapes of Spacetimes : Collected tales of black holes

    Författare :Emma Jakobsson; Ingemar Bengtsson; Marc Mars; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; teoretisk fysik; Theoretical Physics;

    Sammanfattning : In theory, the existence of black holes is predicted by general relativity. In reality, there is a general consensus that they exist in space; in particular at the center of many galaxies. The theory of black holes has been around for decades, but there are still interesting questions calling for attention. LÄS MER

  7. 5. Theoretical and numerical bimetric relativity

    Författare :Francesco Torsello; Edvard Mörtsell; Eugeny Babichev; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; spin-2 fields; extension of general relativity; ghost-free bimetric theory; Hassan–Rosen bimetric relativity; numerical relativity; teoretisk fysik; Theoretical Physics;

    Sammanfattning : General relativity (GR) is the standard physical theory describing gravitational interactions. All astrophysical and cosmological observations are compatible with its predictions, provided that unknown matter and energy components are included. These are called dark matter and dark energy. LÄS MER