Search for dissertations about: "kvantmekanik"
Showing result 11  15 of 54 swedish dissertations containing the word kvantmekanik.

11. Hadronization Effects in the Strong Interaction
University dissertation from Department of Theoretical Physics, Lund UniversityAbstract : Different hadronization effects in high energy interactions are investigated. The framework is the Lund model for the strong interaction. A model for baryon production in jet fragmentation is presented and extended to baryon remnant fragmentation in deep inelastic scattering and hadronhadron collisions. READ MORE

12. Gamow Teller Beta Decay in Drip Line Nuclei
University dissertation from Department of Theoretical Physics, Lund UniversityAbstract : Before radioactive ion beams became available, the GamowTeller (GT) giant resonance was studied using chargeexchange reactions such as (p,n) and (He,t). In betastable nuclei, which can be used as targets, the GT giant resonance lies above the ground state of the mother nucleus. READ MORE

13. Resonant Tunneling in Laterally Confined Quantum Structures
University dissertation from Division of Solid State Physics, Department of Physics, Lund University,Box 118, SE221 00 Lund, SwedenAbstract : In the thesis, threedimensionally confined resonant tunneling structures were studied experimentally. Two approaches were used for obtaining quantum confinement: gatedefined lateral constriction of double barrier structures, and epitaxial growth of selfassembled quantum dots. READ MORE

14. Model Vertices Beyond the GW Approximation
University dissertation from Department of Theoretical Physics, Lund UniversityAbstract : We study the effects of local vertex corrections to the self energy of the electron gas. We find that a vertex derived from timedependent densityfunctional theory can give accurate self energies without including the explicit time dependence of the exchangecorrelation potential provided, however, that a proper decay at large momentum transfer (large q) is built into the vertex function. READ MORE

15. Selfconsistency and the GWapproximation
University dissertation from B. HolmAbstract : The effects of selfconsistency in the GWapproximation are studied. The $GWA$ is known to describe the electronic properties of a wide range of materials very well. However, the calculations made so far have not taken into account the issue of selfconsistency, which is implied in the original formulation of the $GWA$. READ MORE