Essays about: "higher symmetries"

Showing result 1 - 5 of 9 essays containing the words higher symmetries.

  1. 1. An Introduction to Symmetry Protected Topological Phases

    University essay from Uppsala universitet/Teoretisk fysik

    Author : David Petrovic; [2023]
    Keywords : ;

    Abstract : In this thesis, we aim to display characteristics of symmetry protected topological phases within quantum mechanics (QM). Building on well known aspects of QM, we relate the formalism to basic group representation theory, and review the connection between projective symmetries and protected vacuum degeneracies. READ MORE

  3. 2. The Impact of Swampland Conjectures

    University essay from Uppsala universitet/Teoretisk fysik

    Author : Daniel Nilsson; [2023]
    Keywords : String theory; Quantum gravity; Swampland program; Effective field theories;

    Abstract : The Swampland program is way of sorting effective field theories based on conjectures of how an effective field theory consistent with quantum gravity should look like. In this thesis we take a closer look at the No Global Symmetries Conjecture, the Weak Gravity Conjecture, the de Sitter Conjecture and the Trans-Planckian Censorship Conjecture. READ MORE

  4. 3. Strain-induced nonlinear Hall effect in graphene systems

    University essay from Stockholms universitet/Fysikum

    Author : Pedram Pakmehr; [2022]
    Keywords : ;

    Abstract : This thesis aims to study the nonlinear electrical transport response of monolayer and bilayer graphene systems under the influence of different lattice deformations (strain). Broken inversion and rotation symmetries can generate a second-order transverse current response called the nonlinear Hall effect in the presence of time-reversal symmetry. READ MORE

  5. 4. Generalized Abelian Gauge Theory & Generalized Global Symmetry

    University essay from Uppsala universitet/Teoretisk fysik

    Author : Emil Hössjer; [2020]
    Keywords : Differential characters; Wilson lines; generalized global symmetry; BF theory; Maxwell theory; spontaneous symmetry breaking; intersection number; selection rules; Noether theorem; sphere bundle; t Hooft operator;

    Abstract : We study Cheeger-Simons differential characters in order to define higher form U(1) gauge fields and their Wilson lines. We then go on to define generalized global symmetries. This is a topological formulation of symmetries which has interesting consequences when the charged operators extend through space. READ MORE

  6. 5. Towards the Formation of the Antihydrogen Molecular Ion

    University essay from Stockholms universitet/Fysikum

    Author : Thomas Nerdi; [2020]
    Keywords : Antihydrogen; Resonance Scattering; Non-Hermitian Quantum Mechanics;

    Abstract : The ALPHA experiment at CERN is an ongoing project which tests fundamental symmetries between matter and antimatter by producing and trapping antihydrogen atoms in order to perform precision spectroscopic measurements. A logical next step is to form the antihydrogen molecular ion (consisting of one positron and two antiprotons). READ MORE