Search for dissertations about: "CFT"
Showing result 1  5 of 28 swedish dissertations containing the word CFT.

1. Strings, Branes and Nontrivial Spacetimes
Abstract : This thesis deals with different aspects of string and /p/brane theories. One of the motivations for string theory is to unify the forces in nature and produce a quantum theory of gravity. /p/branes and related objects arise in string theory and are related to a nonperturbative definition of the theory. READ MORE

2. Exact Results in Supersymmetric Field Theories : A dissertation on the defect and deformed
Abstract : Quantum field theories (QFTs) are the most precise descriptions of the physical reality that humanity has found. Yet exact predictions are often missing as most computations are notoriously difficult to carry out. One generally resorts to perturbation theory which immediately limits the regime of validity. READ MORE

3. A classifying algebra for CFT boundary conditions
Abstract : Conformal field theories (CFT) constitute an interesting class of twodimensionalquantum field theories, with applications in string theoryas well as condensed matter physics. The symmetries of a CFT can beencoded in the mathematical structure of a conformal vertex algebra. READ MORE

4. On string integrability : A journey through the twodimensional hidden symmetries in the AdS/CFT dualities
Abstract : One of the main topics in the modern String Theory are the conjectured string/gauge (AdS/CFT) dualities. Proving such conjectures is extremely difficult since the gauge and string theory perturbative regimes do not overlap. In this perspective, the discovery of infinitely many conserved charges, i.e. READ MORE

5. Topics on Dbranes and Holography
Abstract : We discuss various aspects of Dbranes in string theory and holography in string theory and loop quantum gravity.One way to study Dbranes is from a microscopic perspective, using conformal field theory techniques. For example, we investigate the question of how Dbranes can be introduced into orbifolded theories. READ MORE