Sökning: "string topology"

Hittade 4 avhandlingar innehållade orden string topology.

  1. 1. Arithmetic and Hyperbolic Structures in String Theory

    Författare :Daniel Persson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Instantons; Kac-Moody algebras; Spacelike singularities; String Theory;

    Sammanfattning : This thesis consists of an introductory text followed by two separate parts which may be read independently of each other. In Part I we analyze certain hyperbolic structures arising when studying gravity in the vicinity of spacelike singularities (the BKL-limit). LÄS MER

  3. 2. Free loop spaces, Koszul duality and A-infinity algebras

    Författare :Kaj Börjeson; Alexander Berglund; Pascal Lambrechts; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Koszul duality; free loop spaces; a-infinity algebras; BV-algebras; string topology; Mathematics; matematik;

    Sammanfattning : This thesis consists of four papers on the topics of free loop spaces, Koszul duality and A∞-algebras. In Paper I we consider a definition of differential operators for noncommutative algebras. This definition is inspired by the connections between differential operators of commutative algebras, L∞-algebras and BV-algebras. LÄS MER

  4. 3. Making Maps and Keeping Logs : Quantum Gravity from Classical Viewpoints

    Författare :Niklas Johansson; Ulf Danielsson; Jan de Boer; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; String theory; black holes in string theory; Calabi-Yau geometry; flux compactifications; three-dimensional gravity; Mathematical physics; Matematisk fysik; Theoretical Physics; teoretisk fysik;

    Sammanfattning : This thesis explores three different aspects of quantum gravity. First we study D3-brane black holes in Calabi-Yau compactifications of type IIB string theory. Using the OSV conjecture and a relation between topological strings and matrix models we show that some black holes have a matrix model description. LÄS MER

  5. 4. Searching for an Ultra High-Energy Diffuse Flux of Extraterrestrial Neutrinos with IceCube 40

    Författare :Henrik Johansson; Christian Walck; Antoine Letessier-Selvon; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Neutrinos; UHE; diffuse; IceCube; Astroparticle physics; Astropartikelfysik; fysik; Physics;

    Sammanfattning : Neutrino astronomy has the potential to greatly improve our understanding of the high-energy universe. An unresolved, diffuse, flux of neutrinos is sensitive to the properties of the population of cosmic accelerators in the universe. LÄS MER