Sökning: "Matematisk Fysik"

Visar resultat 1 - 5 av 131 avhandlingar innehållade orden Matematisk Fysik.

1. 1. On string integrability : A journey through the two-dimensional hidden symmetries in the AdS/CFT dualities

   Författare :Valentina Giangreco Marotta Puletti; Konstantin Zarembo; Gleb Arutyunov; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; String Theory; AdS-CFT correspondence; Integrable Field theory; Sigma models; S-matrix; Factorized Scattering; Physics; Fysik; Mathematical physics; Matematisk fysik; Theoretical Physics; teoretisk fysik;

   Sammanfattning : 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. LÄS MER

3. 2. Abelian Extensions, Fractional Loop Group and Quantum Fields

   Författare :Pedram Hekmati; Jouko Mickelsson; Christoph Schweigert; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lie group extensions; Lie conformal algebras; gerbes; twisted K-theory; renormalization; anomalies; D-brane charges; variational complex; Mathematical physics; Matematisk fysik;

   Sammanfattning : This thesis deals with the theory of Lie group extensions, Lie conformal algebras and twisted K-theory, in the context of quantum physics. These structures allow for a mathematically precise description of certain aspects of interacting quantum field theories. LÄS MER

4. 3. Group Extensions, Gerbes and Twisted K-theory

   Författare :Pedram Hekmati; Jouko Mickelsson; Jürgen Fuchs; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematical physics; Matematisk fysik;

   Sammanfattning : This thesis reviews the theory of group extensions, gerbes and twisted K-theory. Application to anomalies in gauge theory is briefly discussed. The main results are presented in two appended scientific papers. LÄS MER

5. 4. Aspects of extra dimensions and membranes

   Författare :Martin Sundin; Edwin Langmann; Teresia Månsson; Fawad Hassan; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Extra dimensions; Brane world scenarios; Supermembranes; Mathematical physics; Matematisk fysik;

   Sammanfattning : This thesis is about thwo papers related to extra dimensions. Paper A discusses extrinsic curvature effects, and paper B treats symmetries of supersymmetric membranes. In the part of this thesis related to paper A, we extend the theory of non-relativistic quantum particles confined to submanifolds to relativistic boson fields. LÄS MER

7. 5. Exactly solved quantum many-body systems in one dimension

   Författare :Martin Hallnäs; Edwin Langmann; Stefan Rauch-Wojciechowski; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik;

   Sammanfattning : This thesis is devoted to the study of various examples of exactly solved quantum many-body systems in one-dimension. It is divided into two parts: the first provides background and complementary results to the second, which consists of three scientific papers. LÄS MER