Sökning: "renormalization group"

Visar resultat 1 - 5 av 31 avhandlingar innehållade orden renormalization group.

  1. 1. Numerical renormalization group methods

    Författare :Martin Andersson; Chalmers University of Technology; []
    Nyckelord :DMRG; renormalization groups; variational states;

    Sammanfattning : .... LÄS MER

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

    Författare :Pedram Hekmati; Jouko Mickelsson; Christoph Schweigert; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; 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

  3. 3. Soft resummation and hard evolution : Renormalization group methods in effective theories and multi scalar models

    Författare :Joel Oredsson; Teoretisk partikelfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Higgs; Particle physics; two-Higgs-doublet model; Soft-Collinear-Effective Theory; Renormalization;

    Sammanfattning : This thesis is composed out of five papers that deal with various problems intheoretical particle physics. While paper I is a precision calculation in aneffective theory of the Standard Model, paper II to V all deal with beyond theStandard Model physics. Paper IV is a manual for the tools developed during ourwork on paper II to V.Paper I. LÄS MER

  4. 4. Renormalization of perturbations in the spin-1/2 chain

    Författare :David Gustafsson; Chalmers University of Technology; []
    Nyckelord :non-abelian bosonization; renormalization group; perturbations; operator product expansion; Spin- 1 2 chain;

    Sammanfattning : .... LÄS MER

  5. 5. Numerical Renormalization, Doped Antiferromagnets, and Statistics - Topics in Low Dimensional Physics

    Författare :Martin Andersson; Chalmers University of Technology; []
    Nyckelord :Josephson junctions; matrix-product states; fictitious flux; phase-separation; renormalization; stripes; t-J model; anyons; DMRG;

    Sammanfattning : The first part of the thesis deals with so called numerical renormalization group methods, and in particular the density-matrix renormalization group (DMRG). This method performs extremely well for large one-dimensional quantum systems like spin-chains and Hubbard models. LÄS MER