Search for dissertations about: "Renormalization"

Showing result 1 - 5 of 36 swedish dissertations containing the word Renormalization.

  1. 1. Renormalization in Effective Field Theory and Hidden Radiation

    University dissertation from Department of Astronomy and Theoretical Physics, Lund University

    Author : Lisa Carloni; Lunds universitet.; Lund University.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Renormalization; Effective theories; Phenomenological Models; Hidden Sectors;

    Abstract : Popular Abstract in Swedish Denna avhandling handlar om modeller inom partikelfysik, vilka beskriver naturens minsta beståndsdelar. För att studera dessa små grundläggande byggstenar behöver man hög energi. Desto st ¨orre energi ju mindre avstånd kan man studera. READ MORE

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

    University dissertation from Department of Astronomy and Theoretical Physics, Lund University

    Author : Joel Oredsson; Lunds universitet.; Lund University.; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Higgs; Particle physics; two-Higgs-doublet model; Soft-Collinear-Effective Theory; Renormalization;

    Abstract : 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. READ MORE

  3. 3. Renormalization of Lorenz Maps

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Björn Winckler; KTH.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; MATHEMATICS Algebra; geometry and mathematical analysis Mathematical analysis; MATEMATIK Algebra; geometri och analys Analys;

    Abstract : This thesis is a study of the renormalization operator on Lorenz αmaps with a critical point. Lorenz maps arise naturally as first-return maps for three-dimensional geometric Lorenz flows. Renormalization is a tool for analyzing the microscopic geometry of dynamical systems undergoing a phase transition. READ MORE

  4. 4. Cluster Effective Field Theory

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : EMIL RYBERG; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; effective field theory; charge radius; resonant state; renormalization; radiative capture; halo nuclei; power counting; nuclear physics; few-body physics;

    Abstract : Halo nuclei are loosely bound systems consisting of a core plus valence nucleon(s). In so called Halo, or Cluster, effective field theory, the core of the halo nucleus is treated as an effective degree-of-freedom without internal structure. READ MORE

  5. 5. Non-Orthogonality and Electron Correlations in Nanotransport Spin- and Time-Dependent Currents

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Jonas Fransson; Uppsala universitet.; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; non-orthogonality; non-equilibrium; transport; nanosystem; quantum dot; spin-dependent; renormalization; Green function; diagram technique; many-body states; Hubbard operator; electron correlations; time-dependent; Fysik; icke-ortogonal; icke-jämvikt; transport; nanosystem; kvantprick; spinberoende; renormering; Green-funktion; diagramteknik; mångkropparstillstånd; Hubbadoperator; elektronkorrelationer; tidsberoende; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik; Fysik; Physics;

    Abstract : The concept of the transfer Hamiltonian formalism has been reconsidered and generalized to include the non-orthogonality between the electron states in an interacting region, e.g. quantum dot (QD), and the states in the conduction bands in the attached contacts. READ MORE