Search for dissertations about: "M-theory"

Showing result 6 - 10 of 20 swedish dissertations containing the word M-theory.

  2. 6. Dualities, Symmetries and Unbroken Phases in String Theory : Probing the Composite Nature of the String

    Author : Johan Engquist; Joseph Minahan; Charlotte Kristjansen; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Theoretical Physics; String Theory; M-Theory; Higher Spin Gauge Theory; Super Yang-Mills Theory; Anti-de Sitter Spacetime; Singletons; Massless Higher Spin Gauge Fields; AdS CFT Correspondence; Spin Chains; Semiclassical Strings; Tensionless Limits; Conformal Symmetry; Supersymmetry; Higher Spin Gauge Symmetry; Integrability; Fysik; Physics; Fysik;

    Abstract : The thesis treats aspects of string/M-theory in anti-de Sitter spacetimes and their supersymmetric completions. By applying the AdS/CFT correspondence, as well as models of spin chains and singletons, we try to attain a better understanding of the underlying symmetries and the unbroken phases of string/M-theory. READ MORE

  4. 7. Constructing the six-dimensional (2,0) theories

    Author : Erik Flink; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Field theory in higher dimensions; M-theory; string theory;

    Abstract : In this thesis we give a brief review of the six-dimensional(2,0) theories and how they emerge from the study of string/M-theory. In particular, the A_N version of (2,0) theory is the world-volume theory of N+1 parallel M5-branes in the limit where gravity decouples. READ MORE

  5. 8. New horizons in string theory : bubble babble in search of darkness

    Author : Suvendu Giri; Ulf Danielsson; Bert Vercnocke; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; String theory; black holes; dark energy; de Sitter; cosmological constant; M-theory; braneworld; anti de Sitter; Theoretical Physics; Teoretisk fysik;

    Abstract : It was discovered nearly two decades ago that we live in an accelerating universe that is dominated by dark energy. Understanding the origin of such an energy has turned out to be a very difficult open question in physics, and calls on the need for a fundamental theory like string theory. READ MORE

  6. 9. Supersymmetry, branes and the mysterious M

    Author : Pär Stjernberg; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Theoretical physics; Teoretisk fysik; Physics; Fysik; Theoretical Physics; teoretisk fysik;

    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

  7. 10. Electric-Magnetic Duality and Supersymmetry in Four and Six Dimensions

    Author : Andreas Gustavsson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : We study some aspects of the still very mysterious M-theory five-brane, mostly from the world-sheet field theory perspective. One aspect is the Seiberg-Witten curve in N = 2 four-dimensional super Yang-Mills theory. READ MORE