Essays about: "störningsteori"

Showing result 1 - 5 of 9 essays containing the word störningsteori.

1. 1. Geometrical and Perturbative study of Tidally Deformed Schwarzschild Spacetime

   University essay from Uppsala universitet/Teoretisk fysik

   Author : Zeyd Sam; [2020]
   Keywords : ;

   Abstract : Vi undersöker tidvattendeformationen av ett icke-roterande, så kallade Schwarzschild, svarta hål. Vi formulerar geometrin i form av inre och yttre geometriska kvantitet på händelsehorisonten, som beskrivs av en hyperyta inbäddad i rumtiden, och vi gör det genom att formulera Gauss-Codazzi teorin om nollhyperytor som sträcker det standard resultat för rumslika och tidslika fallen. READ MORE

3. 2. Periodic and Non-Periodic Filter Structures in Lasers

   University essay from KTH/Matematik (Avd.)

   Author : Leo Enge; [2020]
   Keywords : Laser; Grating Filters; Perturbation Theory; WKB Approximation; Bi-cubic Splines; Laser; optiska filter; störningsteori; WKB-approximation; bi-kubiska splines;

   Abstract : Communication using fiber optics is an integral part of modern societies and one of the most important parts of this is the grating filter of a laser. In this report we introduce both the periodic and the non-periodic grating filter and discuss how there can be resonance in these structures. READ MORE

4. 3. Fitting the three loop pion mass and decay constant to lattice data

   University essay from Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

   Author : Alexandra Wernersson; [2019]
   Keywords : Chiral Perturbation Theory; Lattice QCD; pion mass; decay constant; three loop fit.; Physics and Astronomy;

   Abstract : We perform a fit to three loop order (NNNLO) in Chiral perturbation theory of the pion mass and decay constant. In particular we investigate if the NNNLO fit is an improvement of the fit to two loop order (NNLO) to lattice QCD data, which was done in a lattice gauge group collaboration. READ MORE

5. 4. Solitons in High Energy Physics

   University essay from Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

   Author : Edvin Olofsson; [2017]
   Keywords : sine-Gordon model; solitons; high energy physics; particle physics; Thirring model; vortices; magnetic monopoles; homotopy; Physics and Astronomy;

   Abstract : Solitons are solutions to classical field equations that are particle like, meaning they are localized in space, have definite energy and can be stable against deformations into the vacuum. In this thesis we investigate under which circumstances such solutions may exist and what effects their existence could have. READ MORE

6. 5. Yang-Mills Condensates in Cosmology

   University essay from Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

   Author : Nikolay Gornov; [2016]
   Keywords : Yang-Mills; dark energy; cosmological constant; FRG; functional renormalization group; Physics and Astronomy;

   Abstract : The cosmological constant is one of bigger mysteries in modern fundamental physics and cosmology. In this work we investigate one of the possible interpretations for the cosmological constant. READ MORE