Search for dissertations about: "S-matrix"

Found 4 swedish dissertations containing the word S-matrix.

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

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Valentina Giangreco Marotta Puletti; Konstantin Zarembo; Gleb Arutyunov; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; String Theory; AdS-CFT correspondence; Integrable Field theory; Sigma models; S-matrix; Factorized Scattering; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik; NATURAL SCIENCES Physics Other physics Mathematical physics; NATURVETENSKAP Fysik Övrig fysik Matematisk fysik; Theoretical Physics; teoretisk fysik;

    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

  2. 2. Ways of determining and characterising resonances in scattering processes

    University dissertation from Stockholm : Department of Physics, Stockholm University

    Author : Ksenia Shilyaeva; Nils Elander; Dage Sundholm; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; quantum scattering theory; complex scaling; resonances; NATURAL SCIENCES Physics Atomic and molecular physics Molecular physics; NATURVETENSKAP Fysik Atom- och molekylfysik Molekylfysik; Physics; fysik;

    Abstract : Scattering cross sections very often display structures. To clarify if these structures correspond to resonances one has to check if they are poles of the scattering matrix (S-matrix) in the fourth quadrant of the complex momentum plane. Furthermore, the states corresponding to these poles also need to have an appropriate scattering amplitude. READ MORE

  3. 3. Nucleon-Nucleon Scattering in a Wave-Packet Formalism

    University dissertation from Stockholm : Department of Physics, Stockholm University

    Author : Sean Miller; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; chiral potentials; two-nucleon scattering; nuclear physics;

    Abstract : In this thesis I analyse the prospect of leveraging statistical analyses of the strong nuclear interaction by using the wave-packet continuum discretisation (WPCD) method to efficiently compute nucleon-nucleon (NN) scattering observables on a graphics processing unit (GPU). The WPCD method gives approximate solutions to the S-matrix at multiple scattering energies at the cost of a single eigendecomposition of the NN channel Hamiltonian. READ MORE

  4. 4. Waves and rays in open billiards

    University dissertation from Linköping : Linköpings universitet

    Author : Torbjörn Blomquist; John B. Delos; [2002]

    Abstract : Semiconductor systems where the deBroglie wavelength of the electron is comparable to the size of the system are called mesoscopic. Such systems are readily produced in laboratories, and have been studied extensively. These systems offer possibilities to study the borderline between quantum and classical physics, chaos and more. READ MORE