Sökning: "spin-1 2"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden spin-1 2.

  1. 1. Investigation of a newrepresentation of spin

    Kandidat-uppsats, Uppsala universitet/Materialteori

    Författare :Minna Palmgren Thun; [2023]
    Nyckelord :Material theory; Spin; Statistical physics; Second quantization; Materialteori; spinn;

    Sammanfattning : The Bose-Hubbard Model, a tight binding model within solid state theory can be solved exactly using a number theoretical approach. From this approach, in the two sited Bose-Hubbard model, the hopping term in the model takes the form of a Pauli x matrix. The hopping term can be interpreted as a two energy level system or a dimer with k+1 particles. LÄS MER

  3. 2. Tsirelson's Bound : Introduction and Examples

    Kandidat-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :Amanda Kaarna; [2022]
    Nyckelord :Tsirelson s bound; Bell inequalities; The CHSH inequality; The I3322 inequality; Semidefinite programming;

    Sammanfattning : Tsirelson's bound is the upper bound for a Bell inequality which is valid for all quantum mechanical systems. We discuss why Tsirelson's bound was developed by looking at some historical arguments in quantum physics, such as the Einstein-Podolsky-Rosen (EPR) paradox, an argument for the quantum mechanical description of physical reality being incomplete, and local hidden variables. LÄS MER

  4. 3. Maximum Likelihood Estimation of Hyperon Parameters in Python : Facilitating Novel Studies of Fundamental Symmetries with Modern Software Tools

    Kandidat-uppsats, Uppsala universitet/Institutionen för materialvetenskap

    Författare :Benjamin Verbeek; [2021]
    Nyckelord :CP-symmetry; maximum log-likelihood; python; estimation; BESIII; PANDA; hyperon; numba;

    Sammanfattning : In this project, an algorithm has been implemented in Python to estimate the parameters describing the production and decay of a spin 1/2 baryon - antibaryon pair. This decay can give clues about a fundamental asymmetry between matter and antimatter. LÄS MER

  5. 4. Finite temperature effects on decay rates in the real-time formalism

    Master-uppsats, Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Författare :Torbjörn Lundberg; [2020]
    Nyckelord :finite; temperature; effect; decay; rate; real; imaginary; time; formalism; real-time; imaginary-time; two-body; neutral; pseudoscalar; scalar; charge; spin-1 2; fermions; thermal; quantum; field; theory; equilibrium; Physics and Astronomy;

    Sammanfattning : This thesis work presents thermal decay rates for several reactions calculated within the framework of the real-time formalism. Processes considered are those of a neutral (pseudo)scalar decaying into two distinct (pseudo)scalars or into a fermion-antifermion pair. LÄS MER

  7. 5. En Översikt av Dekoherens i Kontexten av Kvantmätning med en Exakt Lösbar Ren Dekoherensmodell

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Andrzej Perzanowski; Frode Boman; [2019]
    Nyckelord :;

    Sammanfattning : Vi förklarar konceptet dekoherens genom att först ge bakgrundsin- formation och sedan lösa en enkel modell som är menad att representera ett Stern-Gerlach experiment. Modellen är ett spin-1/2 kvantsystem och en mätapparat som består av en kvantpartikel. LÄS MER