Sökning: "quasiparticles"

Hittade 3 uppsatser innehållade ordet quasiparticles.

  1. 1. Recent Progress on the Black Hole Information Paradox

    Master-uppsats, Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Författare :Eivind Hilmen Jørstad; [2021]
    Nyckelord :Black Holes; Hawking Radiation; Entanglement Entropy; Black Hole Information Paradox; Dilaton Gravity; Quasiparticles; Physics and Astronomy;

    Sammanfattning : The black hole information paradox is of central importance in the study of quantum gravity. The paradox states that quantum fields surrounding a black hole behave in ways that run into conflict with the unitarity of quantum mechanical time evolution. LÄS MER

  3. 2. A mean-field approach to attractive few-body Fermi gas

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Matematisk fysik

    Författare :Morten Piibeleht; [2016]
    Nyckelord :HFB; hartree-fock-bogoliubov; fermi gas; higgs mode; QRPA; quasiparticles; random phase approximation; Physics and Astronomy;

    Sammanfattning : Quantum many-body systems can be studied theoretically from first principles using microscopic models, but the computational cost of numerically exact calculations increases exponentially with the number of particles and the complexity of the interaction, limiting the systems that can be analysed. The Hartree-Fock-Bogoliubov (HFB) and quasiparticle random phase approximation (QRPA) methods, heavily used in nuclear physics, rely on mean-field approximations but scale more favourably with increasing system size and complexity. LÄS MER

  4. 3. A lattice model for topological phases

    Kandidat-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik

    Författare :Jonatan Andersson; [2013]
    Nyckelord :topological order; topological phases; spin lattice model; anyons; quasiparticles; ribbon operators; degenerate ground state; quantum phases;

    Sammanfattning : Matter exists in many different phases, for example in solid state or in liquid phase. There are also phases in which the ordering of atoms is the same, but which differ in some other respect, for example ferromagnetic and paramagnetic states. LÄS MER