Search for dissertations about: "non-local effects"

Showing result 11 - 15 of 25 swedish dissertations containing the words non-local effects.

  2. 11. Distorted Space and Multipoles in Electronic Structure Calculations

    Author : Fredrik Bultmark; Lars Nordström; Susanne Mirbt; Olle Eriksson; Sergej Savrasov; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; materials science; condensed matter theory; density functional theory; Magnetism; Atomic and molecular physics; Atom- och molekylfysik;

    Abstract : This thesis concerns methods for electronic structure calculations and some applications of the methods. The augmented planewave (APW) basis set and it’s relatives LAPW (linearised APW) and APW+lo (local orbitals) have been widely used for electronic structure calculations. READ MORE

  4. 12. Modeling of coupled thermoplasticity at finite strains

    Author : Paul Håkansson; Hållfasthetslära; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mechanical engineering; hydraulics; vacuum technology; vibration and acoustic engineering; Maskinteknik; Heat generation; Phase transformation; Void growth; Thermoplasticity; hydraulik; vakuumteknik; vibrationer; akustik; Crystal plasticity; Finite element;

    Abstract : In this thesis, models for simulation of inelastic phenomena, such as plastic anisotropy, texture evolution, void growth and phase transformation are presented. Special emphasized is put on the modeling of heat generation due to plastic work. All models are formulated within a thermodynamic framework that allows large deformations. READ MORE

  5. 13. Analytical and Numerical Developments in Strongly Correlated Systems: Perspectives from TDDFT and Green's Functions

    Author : Daniel Karlsson; Matematisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Many-Body Perturbation Theory; Hubbard model; TDDFT; Green s function; DFT; Quantum Transport; Disorder; Fysicumarkivet A:2014:Karlsson;

    Abstract : This thesis investigates different methods for treating strongly correlated systems, and discusses their respective strengths and weaknesses. Many of the results presented in this thesis come from comparing the different methods and approximations to exact results. READ MORE

  6. 14. Interacting fermions and non-equilibrium properties of one-dimensional many-body systems

    Author : Per Moosavi; Edwin Langmann; Eddy Ardonne; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik;

    Abstract : Recent experimental progress on ultracold atomic gases have opened up the possibility to simulate many-body systems out of equilibrium. We consider such a system described by the Luttinger model, which is a model of interacting fermions in one spatial dimension.It is well known that the Luttinger model is exactly solvable using bosonization. READ MORE

  7. 15. Quest for quantum signatures in Axion Dark Matter and Gravity

    Author : Vasileios Fragkos; Igor Pikovski; Ingemar Bengtsson; Stockholms universitet; []
    Keywords : Axion Dark Matter; Gravity; Quantum mechanics; Theoretical Physics; teoretisk fysik;

    Abstract : This licentiate thesis in theoretical physics focuses on the existence of quantum features in physical systems such as axion dark matter and gravity. Our focus is mostly on effects which appear at low energies, a regime in which our models can be confronted with current experiments or within the foreseeable future. READ MORE