Sökning: "Few-body"

Hittade 3 uppsatser innehållade ordet Few-body.

1. 1. Quasi-statically driven Otto engine operating simple few-body quantum systems in a 1D infinite square well

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

   Författare :Jim Lundgren; [2018]
   Nyckelord :Otto engine; quantum thermodynamics; Physics and Astronomy;

   Sammanfattning : .... 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. On the Properties of a Few Electron-Hole system in a Double One-dimensional Harmonic Trap

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

   Författare :Fan Pan; [2012]
   Nyckelord :Electron-Hole system; Few-body; CI methods; Exciton-like; Double one-dimension; harmonic trap; Physics and Astronomy;

   Sammanfattning : One of the most important concepts in condensed matter physics is that of ``quasi particles''. The exciton is one such quasi particle. In semi-conductors, excitons are formed by the excitation of electrons from valence band to conduction band, which creates holes in the valence band. LÄS MER