Essays about: "dimensional regularization"

Showing result 16 - 18 of 18 essays containing the words dimensional regularization.

  1. 16. Renormalization in Field Theories

    University essay from Uppsala universitet/Teoretisk fysik

    Author : Alexander Söderberg; [2015]
    Keywords : renormalization in field theories; renormalization; quantum field theories; quantum field theory; quantum mechanics; quantum physics; quantum; physics; mechanics; field theory; theory; theories; fields; field; regularization; dimensional regularization; dimensional; perturbative; perturbative renormalization; wilsonian approach; wilsonian; approach; momentum cutoff; momentum; cutoff; callan; symanzik; equation; callan symanzik equation; coleman; weinberg; model; potential; effective; coleman-weinberg potential; beta function; beta; non abelian; gauge; non abelian gauge theory; non abelian gauge theories; qed; quantum electrodynamics; electrodynamics; qcd; quantum chromodynamics; chromodynamics;

    Abstract : Several different approaches to renormalization are studied. The Callan-Symanzik equation is derived and we study its beta functions. An effective potential for the Coleman-Weinberg model is studied to find that the beta function is positive and that spontaneous symmetry breaking will occur if we expand around the classical field. READ MORE

  3. 17. Deconvolution algorithms of 2D Transmission Electron Microscopy images

    University essay from KTH/Optimeringslära och systemteori

    Author : Ting Meng; Yating Yu; [2012]
    Keywords : Deconvolution; Image restoration; Wiener lter; Wiener deconvolution;

    Abstract : The purpose of this thesis is to develop a mathematical approach and associated software implementation for deconvolution of two-dimensional Transmission Electron Microscope (TEM) images. The focus is on TEM images of weakly scattering amorphous biological specimens that mainly produce phase contrast. READ MORE

  4. 18. Partial Volume Correction in PET/CT

    University essay from Medicinsk strålningsfysik (tills m KI)

    Author : Lars Åkesson; [2008]
    Keywords : PVC algorithm; PET; image; PSF measurements;

    Abstract : In this thesis, a two-dimensional pixel-wise deconvolution method for partial volume correction (PVC) for combined Positron Emission Tomography and Computer Tomography (PET/CT) imaging has been developed. The method is based on Van Cittert's deconvolution algorithm and includes a noise reduction method based on adaptive smoothing and median filters. READ MORE