Search for dissertations about: "Ultracold atoms"

Showing result 1 - 5 of 9 swedish dissertations containing the words Ultracold atoms.

  1. 1. Ultracold atoms in optical potentials from noise-induced transport to superfluidity

    University dissertation from Umeå : Umeå universitet, Institutionen för fysik

    Author : Martin Zelan; Umeå universitet.; [2011]
    Keywords : Brownian motors; noise-induced transport; superfluidity; ultracold atoms; optical potentials; optical lattices; laser coooling; fysik; Physics;

    Abstract : In this thesis, both experimental studies and numerical simulations of ultracold atoms in optical potentials are presented in a collection of nine scientific papers. In particular, noise-induced transport in dissipative optical lattices and superfluid properties of Bose-Einstein condensates have been studied. READ MORE

  2. 2. Ultracold rubidium atoms in periodic potentials

    University dissertation from Umeå : Fysik

    Author : Robert Saers; Umeå universitet.; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Bose-Einstein condensation; optical lattice; quantum phase transition; experiment; theory; NATURAL SCIENCES Physics Condensed matter physics; NATURVETENSKAP Fysik Kondenserade materiens fysik;

    Abstract : This thesis includes both experimental and theoretical investigations, presented in a series of eight papers. The experimental part ranges from the construction procedures of an apparatus for Bose-Einstein condensates, to full scale experiments using three different set-ups for ultracold atoms in optical lattices. READ MORE

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

    University dissertation from Umeå : Fysik

    Author : Magnus Rehn; Umeå universitet.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ultracold atoms; optical lattices; Bose-Einstein condensation; quantum phase transitions; NATURAL SCIENCES Physics; NATURVETENSKAP 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

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

    University dissertation from Stockholm : KTH

    Author : Sara Bergkvist Sylvan; KTH.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Teoretisk Fysik; Kondenserade materiens teori; NATURAL SCIENCES Physics Condensed matter physics; NATURVETENSKAP Fysik Kondenserade materiens fysik;

    Abstract : 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. READ MORE

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

    University dissertation from Department of Physics, Lund University

    Author : Alexey Kartsev; Lund University.; Lunds universitet.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:2013:Kartsev;

    Abstract : 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. READ MORE