Sökning: "renormalization"

Visar resultat 21 - 25 av 56 avhandlingar innehållade ordet renormalization.

  1. 21. Interactions on the edge of a quantum spin Hall insulator

    Författare :Anders Ström; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; topological insulators; quantum spin Hall effect; low-dimensional physics; bosonization; renormalization group;

    Sammanfattning : Effects from electron-electron interactions on the edge of a quantum spin Hall insulator are studied using bosonisation and renormalisation group methods. First, a quantum spin Hall device with a point contact connecting two of its edges is considered. LÄS MER

  3. 22. Renormalization groups and variational states in an interacting 1D quantum model

    Författare :Stefan Rommer; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Heisenberg model; variational states; DMGR;

    Sammanfattning : .... LÄS MER

  4. 23. Density-matrix renormalization-group analysis of quantum phase transitions in disordered spin chains

    Författare :Laura Gabriela Urba; KTH; []
    Nyckelord :Quantum Phase Transitions; Spin Chains; Disordered Systems; Critical Phenomena;

    Sammanfattning : .... LÄS MER

  5. 24. Beta functions and multi-scalar gauge theory

    Författare :Nadia Flodgren; Bo Sundborg; Konstantin Zarembo; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; multi-scalar theory; gauge theory; theoretical physics; renormalization group theory; high-energy physics; Theoretical Physics; teoretisk fysik;

    Sammanfattning : In this licentiate thesis, we provide the context and background for our work One-loop algebras and fixed flow trajectories in adjoint multi-scalar gauge theory (published in JHEP) on the renormalization group flow for a multi-scalar SU(N) gauge theory. The background consists of a description of renormalization group flow, with a focus on beta functions andhow to find fixed points, and multi-scalar theories. LÄS MER

  7. 25. Phenomenology of neutrino properties, unification, and Higgs couplings beyond the Standard Model

    Författare :Stella Riad; Tommy Ohlsson; Nuria Rius; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Effective field theories; neutrino physics; extra dimensions; universal extra dimensions; Higgs physics; renormalization group running; Bayesian statistics; grand unified theories; Fysik; Physics;

    Sammanfattning : The vast majority of experiments in particle physics can be described by the Standard Model of particle physics (SM). However, there are indications for physics beyond it. The only experimentally demonstrated problem of the model is the difficulty to describe neutrino masses and leptonic mixing. LÄS MER