Sökning: "Ultracold atoms"

Visar resultat 6 - 10 av 11 avhandlingar innehållade orden Ultracold atoms.

  1. 6. Triptych of quantum matter in one dimension : Playful constructions in theoretical and computational physics

    Författare :Axel Gagge; Jonas Larson; Andrew Daley; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Bloch oscillations; Peierls; adiabatic; diabatic; ultracold atoms; Bose-Fermi mixtures; phonon; cQED; superradiance; polarons; DMRG; MPS; Kosterlitz-Thouless; Wannier; Bloch; quantum phase transitions; Theoretical Physics; teoretisk fysik;

    Sammanfattning : In this compilation thesis, three different quantum mechanical systems are presented. All three have in common that they are one-dimensional quantum systems which, each in their own way, can be seen as analogous to other quantum systems. LÄS MER

  3. 7. Numerical studies of spin chains and cold atoms in optical lattices

    Författare :Sara Bergkvist Sylvan; Anders Rosengren; Richard Scalettar; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Teoretisk Fysik; Kondenserade materiens teori; Condensed matter physics; Kondenserade materiens fysik;

    Sammanfattning : An important, but also difficult, research field in condensed matter physics is that of strongly correlated systems. This thesis considers two topics in this field. The first topic is disorder and frustration in spin models. The introduction of disorder into quantum spin chains creates a complex problem. LÄS MER

  4. 8. Non-equilibrium fermions within lattice density functional theory: quantum transport and ultracold-atom phenomena

    Författare :Alexey Kartsev; Matematisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:2013:Kartsev;

    Sammanfattning : Cutting-edge technology needs small, ultrafast devices, operational in a wide range of regimes. This calls for solids with novel, unconventional and tailorable properties. Great progress is expected from materials in which electron-electron and electron-phonon correlations strongly affect the dynamics ( i.e. LÄS MER

  5. 9. A single trapped Rydberg ion

    Författare :Gerard Higgins; Markus Hennrich; Tilman Pfau; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Trapped ions; Rydberg physics; quantum information platforms; atomic physics; fysik; Physics;

    Sammanfattning : Systems of trapped ions and systems of ultracold Rydberg atoms are used at the forefront of quantum physics research and they make strong contenders as platforms for quantum technologies. Trapped Rydberg ions are a new hybrid technology envisaged to have both the exquisite control of trapped ion systems and the strong interactions of Rydberg atoms. LÄS MER

  7. 10. Atom-Diatom Scattering. From Potential Energy Surfaces to Rate Constants

    Författare :Erik Abrahamsson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis is about the theoretical study of collisions between atoms and diatomic molecules. It might seem like a trivial problem, but in reality it is a highly complex process. Despite, or because of, their apparent simplicity, these processes are of importance for a broad area of science. LÄS MER