Search for dissertations about: "optical lattices"

Showing result 1 - 5 of 18 swedish dissertations containing the words optical lattices.

  1. 1. Atomic transport in optical lattices

    University dissertation from Umeå : Umeå universitet, Institutionen för fysik

    Author : Henning Hagman; Umeå universitet.; [2010]
    Keywords : Ultra-cold atoms; optical lattice; laser cooling; directed transport; Brownian motor; Brownian motion;

    Abstract : This thesis includes both experimental and theoretical investigations of fluctuation-induced transport phenomena, presented in a series of nine papers, by studies of the dynamics of cold atoms in dissipative optical lattices. With standard laser cooling techniques about 108 cesium atoms are accumulated, cooled to a few μK, and transferred into a dissipative optical lattice. READ MORE

  2. 2. 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

  3. 3. Gaps, Traps and Lattices - Correlations in Small Quantum Systems

    University dissertation from Division of Mathematical Physics, Department of Physics, Faculty of Engineering, Lund University

    Author : Magnus Borgh; Lund University.; Lunds universitet.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; magnetiska och optiska ; egenskaper elektriska; Cold atoms; Quantum dots; Optical lattices; classical mechanics; Mathematical and general theoretical physics; Exact diagonalization; Density Functional Theory; Vortices; relativity; quantum mechanics; termodynamik; statistisk fysik; relativitet; kvantmekanik; klassisk mekanik; Matematisk och allmän teoretisk fysik; thermodynamics; statistical physics; Condensed matter:electronic structure; gravitation; supraledare; magnetisk resonans; electrical; magnetic and optical properties; supraconductors; magnetic resonance; relaxation; spectroscopy; Kondenserade materiens egenskaper:elektronstruktur; spektroskopi; Fysicumarkivet A:2007:Borgh;

    Abstract : This dissertation investigates properties of two-dimensional many-body systems. Studies are performed using the Spin-Density Functional Theory with the Local Spin-Density Approximation, and numerical exact diagonalization. READ MORE

  4. 4. Multi-species systems in optical lattices From orbital physics in excited bands to effects of disorder

    University dissertation from Stockholm : Department of Physics, Stockholm University

    Author : Fernanda Pinheiro; Stockholms universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Theoretical Physics; teoretisk fysik;

    Abstract : In this thesis we explore different aspects of the physics of multi-species atomic systems in optical lattices. In the first part we will study cold gases in the first and second excited bands of optical lattices - the p and d bands. READ MORE

  5. 5. Laser cooling mechanisms and Brownian motors in optical lattices

    University dissertation from Umeå : Fysik

    Author : Peder Sjölund; Umeå universitet.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TECHNOLOGY Engineering physics Optical physics; TEKNIKVETENSKAP Teknisk fysik Optisk fysik;

    Abstract : Denna avhandling innefattar såväl experimentella som numeriska studier av laserkylda atomer i optiska kristallgitter. Bland annat har laserkylningsprocesser studerats, där atomers rörelser i optiska kristallgitter har uppvisat andra typer av bakomliggande mekanismer än de som tidigare förutsågs genom “Sisyfoskylningsmodellen”. READ MORE