Essays about: "quasiparticles"

Found 2 essays containing the word quasiparticles.

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

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

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

    Abstract : 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. READ MORE

  2. 2. A lattice model for topological phases

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik

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

    Abstract : 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. READ MORE