Search for dissertations about: "optical potential"

Showing result 1 - 5 of 437 swedish dissertations containing the words optical potential.

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

    Author : Martin Zelan; Claude Dion; Sile Nic Chormaic; Umeå universitet; []
    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. Optical Design for Stationary Solar Concentrators

    Author : Johan Nilsson; Energi och ByggnadsDesign; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; photovoltaic cells; parabolic reflectors; optical efficiency; Solar concentrators; photovoltaic-thermal systems; non-imaging optics; optical properties; building integrated photovoltaics; non uniform irradiance distribution; structured reflectors; solar cell modelling; ray tracing;

    Abstract : Solar electricity is one of the most promising technologies for our future electricity supply. By using concentrators, it is possible to reduce the cost of generating photovoltaic electricity. This thesis discusses how to design stationary low concentrating systems for photovoltaic or PV/Thermal applications. READ MORE

  3. 3. Electrochromic materials : optical, electrophysical and structural properties

    Author : Anne M. Andersson; Chalmers University of Technology; []
    Keywords : mechanical stress; cyclic voltammetry; microstructure; topotaxy; infrared reflectance spectroscopy; window coating; optical characterization; optical characterization; smart window; x-ray electron spectroscopy; soft chemistry; intercalation; energy efficiency; evaporation; electrochromism; polymer electrolyte; ion storage; nickel oxide; Christiansen effect; structural characterization; transmission electron spectroscopy; chemical potential; vanadium oxide; sputtering; electrochemistry; tungsten oxide; thin film technolology; x-ray diffraction spectrometry; infrared reflectance spectroscopy; impedance spectroscpoy;

    Abstract : .... READ MORE

  4. 4. Optical Memories and Processing in Time- and Frequency Domain

    Author : Baozhu Luo; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Optical storage; photon echo; spectral hole burning; nonlinear optics; fiber amplifier; logical operation; phase retrieval; polarization holographic recording and retrieval; optical processing; Atomic and molecular physics; Atom- och molekylärfysik; Fysicumarkivet A:1998:Luo;

    Abstract : Spectral hole burning and photon echoes are the techniques for frequency-selective optical memories, which have the potential to increase areal data storage density by a factor 10**7. They also have the capability to perform in-memory data processing. READ MORE

  5. 5. Atomic transport in optical lattices

    Author : Henning Hagman; Claude Dion; Daniel Comparat; Umeå universitet; []
    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