Search for dissertations about: "Bose-Einstein-Condensation"

Showing result 1 - 5 of 11 swedish dissertations containing the word Bose-Einstein-Condensation.

  1. 1. Bose-Einstein Condensation of Magnetic Excitons in Semiconductor Quantum Wells

    Author : Vitalie Boţan; Lars Nordström; Sveatoslav Moskalenko; Pavlos Lagoudakis; Uppsala universitet; []
    Keywords : Physics; Bose-Einstein condensation; magnetic excitons; electron-hole pairs; electron-hole liquid; magnetorotons; magnetoplasmons; superfluidity; Fysik;

    Abstract : In this thesis regimes of quantum degeneracy of electrons and holes in semiconductor quantum wells in a strong magnetic field are studied theoretically. The coherent pairing of electrons and holes results in the formation of Bose-Einstein condensate of magnetic excitons in a single-particle state with wave vector K. READ MORE

  2. 2. Experimental and Numerical Investigations of Ultra-Cold Atoms

    Author : Magnus Rehn; Anders Kastberg; Claude Dion; Matti Kaivola; Umeå universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Ultracold atoms; optical lattices; Bose-Einstein condensation; quantum phase transitions; Physics; Fysik;

    Abstract : I have been one of the main responsible for building a new laboratory for Bose-Einstein condensation with 87Rb. In particular, the experimental setup has been designed for performing experiments with Bose-Einstein condensates load into optical lattices of variable geometries. All parts essential for Bose-Einstein condensation are in place. READ MORE

  3. 3. Exotic states of matter : Molecular effects in investigations of weak, strong, and long-range forces

    Author : Svante Jonsell; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Quantum chemistry; beta decay; neutrino mass; HeH ; nonadiabatic effects; pionic hydrogen; pion mass; three-body resonances; antihydrogen; annihilation; cold collisions; Bose- Einstein condensation; Kvantkemi; Quantum chemistry; Kvantkemi; Quantum Chemistry; kvantkemi;

    Abstract : Some cases in which the interpretation of experiments in nuclear, particle, and low temperature physics requires understanding of molecular effects have been studied.Neutrino-mass determination from β decay of T2 requires knowledge of the energy loss due to molecular excitations of the daughter HeT+ molecule. READ MORE

  4. 4. Quantum Few-Body Physics with the Configuration Interaction Approach: Method Development and Application to Physical Systems

    Author : Jonas Cremon; Matematisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Tonks-Girardeau gas; vortices; Bose-Einstein condensation; quantum many-particle physics; quantum few-particle physics; Lee-Suzuki approximation; configuration interaction method; Wigner localization; quantum dots; ultra-cold gases; Fysicumarkivet A:2010:Cremon;

    Abstract : This dissertation, based on six included papers, theoretically investigates properties of quantum few-particle systems. An overview of related experimental research - ultra-cold trapped dilute gases, and electrons in quantum dots - is given, followed by a description of some of the studied many-particle phenomena - Bose-Einstein condensation, quantized vortices, Wigner localization and the Tonks-Girardeau gas. READ MORE

  5. 5. Non-Perturbative Quantum Field Theory in Extreme Environments

    Author : Per Liljenberg; Chalmers University of Technology; []
    Keywords : pair production; Bose-Einstein condensation; functional representation; Schwinger model; external field; boson stars; temperature; magnetisation;

    Abstract : The aim of this thesis is to describe some physical systems which can be treated by non-perturbative methods in quantum field theory. In the thesis we study systems described by quadratic Hamiltonians, possibly extended with an external electromagnetic field and/or with a thermal heat bath. READ MORE