Sökning: "string theory"
Visar resultat 11 - 15 av 103 avhandlingar innehållade orden string theory.
11. The Quest for M-theory
Sammanfattning : In ten dimensions, there exist five consistent string theories and in eleven dimensions there is a unique supergravity theory. When trying to find the fundamental theory of nature this is clearly an "embarrassment of riches". In the mid 90s, however, it was discovered that these theories are all related via a kind of transformation called duality. LÄS MER
12. Vertex Operators, String Vertices and Conformal Field Theory Deformations
Sammanfattning : We compute multi-string interaction vertices by sewing of basic string interaction vertex operators, so called dual Reggeon vertex operators. These operators describe the interaction between two complete external string sectors. They are particularly useful when the interactions involve twisted sectors. LÄS MER
13. Arithmetic and Hyperbolic Structures in 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
14. Whatever goes around comes around : modular invariance in string theory and conformal field theory
Sammanfattning : .... LÄS MER
15. Linking Chains Together : String Bits and the Bethe Ansatz
Sammanfattning : This thesis is divided into two parts. In the first part we focus mainly on certain aspects of the AdS/CFT correspondence. The AdS/CFT correspondence is a proposed duality between Type IIB superstring theory on AdS5 x S5 and N = 4 supersymmetric Yang-Mills theory. LÄS MER
