Search for dissertations about: "EXCITATIONS"

Showing result 1 - 5 of 238 swedish dissertations containing the word EXCITATIONS.

  2. 1. Excitations in Superfluids : From solitons to gravitational waves

    Author : Alberto Cetoli; Emil Lundh; Luis Santos; Umeå universitet; []
    Keywords : ;

    Abstract : In 1995 two different research groups observed for the first time the Bose-Einstein condensation (BEC) in ultracold gases. When the confining magnetic trap was turned off the gas was left free to expand, and the velocity of the particles showed a clear peak: most of the particles were occupying the same single particle state, the one of lowest energy. READ MORE

  4. 2. Double Excitations in Helium Atoms and Lithium Compounds

    Author : Marcus Agåker; Jan-Erik Rubensson; Leif Karlsson; David Ederer; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Atomic and molecular physics; Soft X-ray emission; resonant inelastic X-ray scattering; double excitations; lithium halide; helium; Atom- och molekylfysik;

    Abstract : This thesis addresses the investigation of doubly excited 2l´nl states in helium atoms and double core excitations in solid lithium compounds.Measurements on He are made in field free environments and under the influence of electric and magnetic fields, using synchrotron based inelastic photon scattering. READ MORE

  5. 3. Stability and control of shear flows subject to stochastic excitations

    Author : Jérôme Hoepffner; Dan Henningson; John Burns; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; control; estimation; stochastic excitations; feedback; model reduction; Fluid mechanics; Strömningsmekanik;

    Abstract : In this thesis, we adapt and apply methods from linear control theory to shear flows. The challenge of this task is to build a linear dynamic system that models the evolution of the flow, using the Navier--Stokes equations, then to define sensors and actuators, that can sense the flow state and affect its evolution. READ MORE

  6. 4. Optical excitations in molecular aggregates

    Author : Tobias Ambjörnsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : .... READ MORE

  7. 5. Excitations in small molecules and polyenes : CO and (CH)x

    Author : Nestor Correia; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : .... READ MORE