Essays about: "symmetry breaking"

Showing result 11 - 15 of 34 essays containing the words symmetry breaking.

1. 11. QFT and Spontaneous Symmetry Breaking

   University essay from Uppsala universitet/Teoretisk fysik

   Author : Sheila Chauwinoir; [2020]
   Keywords : quantum field theory; abelian and non-abelian gauge theories; quantum electrodynamics; quantum chromodynamics; electroweak interaction; spontaneous symmetry breaking; higgs mechanism;

   Abstract : The aim of this project is to understand the structure of the Standard Model of the particle physics. Therefore quantum field theories (QFT) are studied in the both cases of abelian and non-abelian gauge theories i.e. quantum electrodynamics (QED), quantum chromodynamics (QCD) and electroweak interaction are reviewed. READ MORE

3. 12. Construction of the Higgs Mechanism and the Lee-Quigg-Thacker-bound

   University essay from Uppsala universitet/Högenergifysik

   Author : Franz Wilhelm; [2019]
   Keywords : higgs mechanism; higgs; LQT; LQT-bound; spontaneous symmetry breaking; symmetry breaking; electroweak sector; higgs mass;

   Abstract : In this paper the higgs mechanism for the standard model is constructed in steps. First by considering spontaneous breaking of discrete and continuous global gauge invariance. Then spontaneous breaking of local gauge invariance. READ MORE

4. 13. Discussions on Dai-Freed Anomalies

   University essay from Uppsala universitet/Teoretisk fysik

   Author : Huaiyu Li; [2019]
   Keywords : Anomaly; Quantum Fields Theory; Dai-Freed Theorem; Topology;

   Abstract : In both field theories of high energy physics and field theories of condensed matter theories anomalies have been imposing constraints and bringing up new theories. While the perturbational and local anomalies from triangle diagrams are well-developed, we follow and review two works leading to non-perturbational global anomalies both related with Atiyah-Patogi-Sieger (APS) index theorem. READ MORE

5. 14. Shell-model calculations in Ca-region

   University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

   Author : Weiyi Cui; [2018]
   Keywords : shell model; configuration interaction; NuShellX; nuclear energy levels; Physics and Astronomy;

   Abstract : In this project, the conguration interaction (CI) method is used to study the nuclear spectra and the interactions between the nucleons in certain nuclei. The NuShellX@MSU code based on the CI method is used to calculate and compare the energy levels of the nuclei 42Ca, 42Ti, 42Sc, 48Cr on the basis of the J-scheme. READ MORE

6. 15. Spontaneous symmetry breaking for dipolar Bose-Einstein condensates in multiwell potentials

   University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi

   Author : Jakob Lundström; [2018]
   Keywords : Physics; Bose-Einstein condensates; multiwell potentials;

   Abstract : In this work, dipolar Bose-Einstein condensates in multiwell potentialsplaced to form dierent geometrical structures are studied theoretically inorder to determine how the ground state population of the particles in thepotential wells changes depending on the relative strength of the particlesdipole moment. In the analytical limit (neglecting intersite tunneling), asymmetry-breaking change in the number of wells that are populated byparticles is observed for all studied systems for a certain value of the rela-tive strength of the particles dipole moment. READ MORE