Sökning: "higher symmetries"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden higher symmetries.

  1. 1. An Introduction to Symmetry Protected Topological Phases

    Kandidat-uppsats, Uppsala universitet/Teoretisk fysik

    Författare :David Petrovic; [2023]
    Nyckelord :;

    Sammanfattning : 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. LÄS MER

  3. 2. The Impact of Swampland Conjectures

    Master-uppsats, Uppsala universitet/Teoretisk fysik

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

    Sammanfattning : 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. LÄS MER

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

    Master-uppsats, Stockholms universitet/Fysikum

    Författare :Pedram Pakmehr; [2022]
    Nyckelord :;

    Sammanfattning : 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. LÄS MER

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

    Master-uppsats, Uppsala universitet/Teoretisk fysik

    Författare :Emil Hössjer; [2020]
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

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

    Magister-uppsats, Stockholms universitet/Fysikum

    Författare :Thomas Nerdi; [2020]
    Nyckelord :Antihydrogen; Resonance Scattering; Non-Hermitian Quantum Mechanics;

    Sammanfattning : 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). LÄS MER