Sökning: "few-electron system"

Hittade 2 uppsatser innehållade orden few-electron system.

1. 1. 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

3. 2. Exact Diagonalization of Few-electron Quantum Dots

   Kandidat-uppsats, Institutionen för datavetenskap, fysik och matematik, DFM

   Författare :Shirin Hakimi; [2009]
   Nyckelord :two-dimensional quantum dot; strongly correlated system; few-electron system; exact diagonalization; Lanczos method; Landau level; fractional quantum Hall effect; Wigner crystal; Hartree-Fock approximation; Second quantization;

   Sammanfattning : We consider a system of few electrons trapped in a two-dimensional circularquantum dot with harmonic confinement and in the presence of ahomogeneous magnetic field, with focus on the role of e-e interaction. Byperforming the exact diagonalization of the Hamiltonian in second quantization,the low-lying energy levels for spin polarized system are obtained. LÄS MER