Search for dissertations about: "Correlation functions"

Showing result 1 - 5 of 282 swedish dissertations containing the words Correlation functions.

  1. 1. Correlation Functions in Integrable Theories From weak to strong coupling

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Raul Pereira; Joseph Minahan; Sergey Frolov; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Superstring theory; AdS CFT correspondence; Integrable field theories; Hexagon form factors; Theoretical Physics; Teoretisk fysik;

    Abstract : The discovery of integrability in planar N=4 super Yang-Mills and ABJM has enabled a precise study of AdS/CFT. In the past decade integrability has been successfully applied to the spectrum of anomalous dimensions, which can now be obtained at any value of the coupling. READ MORE

  2. 2. Static and Dynamic Correlation Effects in Atoms

    University dissertation from Nils Erik Dahlen, Sölvegatan 14A, SE-223 62 Lund, Sweden

    Author : Nils-Erik Dahlen; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; magnetic and optical properties; electrical; Condensed matter:electronic structure; relaxation; magnetic resonance; supraconductors; spectroscopy; Kondenserade materiens egenskaper:elektronstruktur; Atom- och molekylärfysik; Atomic and molecular physics; spektroskopi; magnetisk resonans; egenskaper elektriska; supraledare; magnetiska och optiska ; variational energies; double ionization; Electron correlation; laser-atom interaction; Fysicumarkivet A:2002:Dahlen; conserving approximations; Green s functions; GW-approximation;

    Abstract : The thesis considers the effects of electron correlation by studying the two opposite limits of atoms in the ground state and atoms in strong laser pulses. Computational methods and theoretical approaches differ significantly due to the different physical processes that are studied in these two cases. READ MORE

  3. 3. Some results on fast correlation attacks

    University dissertation from Department of Information Technology, Lund Univeristy

    Author : Fredrik Jönsson; [2002]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Technological sciences; stream ciphers; linear feedback shift registers; cryptology; correlation attacks; cryptanalysis; Teknik; Informatics; systems theory; Informatik; systemteori;

    Abstract : This thesis presents new results on fast correlation attacks on stream ciphers. In particular, fast correlation attacks on stream ciphers containing linear shift registers with an arbitrary number of taps, are considered. A general introduction to stream ciphers and correlation attacks is given. READ MORE

  4. 4. Theoretical investigation of screening phenomena in electrolyte solutions

    University dissertation from Department of Information Technology, Lund Univeristy

    Author : Johan Ulander; [1998]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; screening; integral equation theories; decay lenght; asymptotic; correlation functions; HNC; pair distribution functions; hyper netted chain; correlation functions; effective charges; electrolytes; primitive model; charge assymetry; dressed ion theory; charge assymetry;

    Abstract : .... READ MORE

  5. 5. Time-Dependent Many-Body Perturbation Theory: Possibilities and Limitations

    University dissertation from Department of Information Technology, Lund Univeristy

    Author : Marc Puig von Friesen; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Many-body perturbation theory; Correlation functions; Hubbard model; Non-equilibrium Green s functions; Fysicumarkivet A:2011:Puig von Friesen;

    Abstract : This dissertation investigates the possibilities and limitations of time-dependent many-body perturbation theory by studying small Hubbard clusters for which the exact solution is available. The first part of the thesis is comprised of a short introduction to the concepts and methodologies used. READ MORE